Name: 2025 October 1st, 2nd, 3rd hottest on record?
Start: 2025-10-09T19:46:14.700631Z
End: 2025-11-10T00:00:00Z

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This market will resolve based on the data for the Global Land-Ocean Temperature Index for October 2025 versus the data points available for all other Octobers on record.

Note: If October 2025 is tied for first, second, or third hottest with another year, it will qualify for the bracket it ties with.

The primary resolution source for this market will be the figures found in the table titled "GLOBAL Land-Ocean Temperature Index in 0.01 degrees Celsius" under the column "Oct" (https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used.
If no information for October 2025 is provided by NASA by December 31, 2025, 11:59 PM ET, a consensus of credible sources will be used to resolve this market.

2nd hottest

Lower

1st hottest

3rd hottest

123Hottest month on record

2025 October 1st, 2nd, 3rd hottest on record?

This market will resolve based on the data for the Global Land-Ocean Temperature Index for September 2025 versus the data points available for all other Septembers on record.

Note: If 2025 September is tied for first, second, or third hottest with another year, it will qualify for the bracket it ties with.

The primary resolution source for this market will be the figures found in the table titled "GLOBAL Land-Ocean Temperature Index in 0.01 degrees Celsius" under the column "Sep" (https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used. If no information for August 2025 is provided by NASA by November 1, 2025, 11:59 PM ET, a consensus of credible sources will be used to resolve this market.

2025 September 1st, 2nd, 3rd hottest on record?

This market will resolve based on the data for the Global Land-Ocean Temperature Index for December 2025 versus the data points available for all other Decembers on record.

Note: If December 2025 is tied for first, second, or third hottest with another year, it will qualify for the bracket it ties with.

The primary resolution source for this market will be the figures found in the table titled "GLOBAL Land-Ocean Temperature Index in 0.01 degrees Celsius" under the column "Dec" (https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used.
If no information for December 2025 is provided by NASA by January 31, 2026, 11:59 PM ET, a consensus of credible sources will be used to resolve this market.

Will December 2025 be the 4th or lower hottest on record?

This market will resolve to "Yes" if the data for the Global Land-Ocean Temperature Index for 2025 shows the second greatest increase of any previously recorded year when it is released. Otherwise, this market will resolve to "No".

An anomaly which is the second greatest of any previously recorded year for 2025 is necessary and sufficient to resolve this market to "Yes" immediately once the data becomes available, regardless of whether the figure for 2024 and/or 2025 is later revised.

The primary resolution source for this market will be the figure found in the table titled "Land-Ocean Temperature Index (C)" under the column "No_Smoothing" in the row "2025" (https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used. If no information for 2025 is provided by NASA by March 1, 2026, 11:59 PM ET, this market will resolve based on a consensus of credible reporting.

Will 2025 be the second hottest year on record?

This market will resolve to "Yes" if the data for the Global Land-Ocean Temperature Index for 2025 shows an increase greater than that of any previously recorded year when it is released. Otherwise, this market will resolve to "No".

An anomaly greater than that of any previously recorded year for 2025 is necessary and sufficient to resolve this market to "Yes" immediately once the data becomes available, regardless of whether the figure for 2024 and/or 2025 is later revised.

The primary resolution source for this market will be the figure found in the table titled "Land-Ocean Temperature Index (C)" under the column "No_Smoothing" in the row "2025" (https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used. If no information for 2025 is provided by NASA by March 1, 2026, 11:59 PM ET, this market will resolve based on a consensus of credible reporting.

Will 2025 be the hottest year on record?

This market will resolve according to the numerical rank of how hot 2026 is when compared against all other years for which the Global Land-Ocean Temperature Index has data.

Years will be ranked in descending order, starting with the hottest as number 1, the second hottest as number 2, etc.

If 2026 ties with any other year, it will resolve according to the place the year it ties with occupies.

This market will resolve immediately once the specified data becomes available, regardless of whether the figure for the relevant years is later revised.

The primary resolution source for this market will be the figure found in the table titled "Land-Ocean Temperature Index (C)" under the column "No_Smoothing" in the row "2026" (https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used. If no information for 2026 is provided by NASA by March 1, 2027, 11:59 PM ET, this market will resolve based on a consensus of credible reporting.

Will 2026 be the second-hottest year on record?

This market will resolve according to the minimum Arctic sea ice extent for all days between August 1, 2026 and October 1, 2026, as published by the National Snow and Ice Data Center.

This market will remain open until data has been published for October 1, 2026, at which point it will resolve immediately. Any revisions to sea ice extent recorded after data is published for October 1, 2026 will not be considered.

The resolution source for this market measures temperatures to thousands of square kilometers (e.g. 4.255 million sq km). Thus, this is the level of precision that will be used when resolving the market.

The resolution source for this market will be information from the National Snow and Ice Data Center, specifically the minimum value recorded for any day between August 1, 2026 and October 1, 2026 in the “NH-Daily-Extent” tab of the “Sea Ice Index Daily Extent” data set, available at https://nsidc.org/sea-ice-today/sea-ice-tools. If this resolution source becomes unavailable, another resolution source will be chosen.

Will the minimum Arctic sea ice extent this summer be less than 4m square kilometers?

This market will resolve according to the maximum Arctic sea ice extent for all days between November 20, 2025 and April 1, 2026, as published by the National Snow and Ice Data Center.

This market will remain open until data has been published for April 1, 2026, at which point it will resolve immediately. Any revisions to sea ice extent recorded after data is published for April 1, 2026 will not be considered.

The resolution source for this market measures Arctic sea ice extent to thousands of square kilometers (e.g. 14.255 million sq km). Thus, this is the level of precision that will be used when resolving the market.

The resolution source for this market will be information from the National Snow and Ice Data Center, specifically the maximum value recorded for any day between November 20, 2025 and April 1, 2026 in the “NH-Daily-Extent” tab of the “Sea Ice Index Daily Extent” data set, available at https://nsidc.org/sea-ice-today/sea-ice-tools. If this resolution source becomes unavailable, another resolution source will be chosen. 

Will the maximum Arctic sea ice extent this winter be at least 15m square kilometers?

This market will resolve to the movie with the third highest 2025 gross once data for December 31 is made available.

Data from the "Gross" column on https://www.boxofficemojo.com/year/2025/?grossesOption=calendarGrosses will be used to resolve this market.

Note: This market is about the movie's domestic calendar gross in 2025 - dates outside of 2025 will not count toward this movie's gross.

In the event of an exact tie the film that comes first alphabetically will be considered the winner.

If there is no final data available by January 7, 2026, 11:59 PM ET, another credible resolution source will be chosen.

Will Superman be the third highest grossing movie of 2025?

This market will resolve to "Yes" if a natural meteoroid (bolide) explodes in Earth's atmosphere with a total impact energy greater or equal to 5 kilotons of TNT equivalent between May 28, and December 31, 2025, 11:59 PM ET. Otherwise, this market will resolve to “No”.

The object must be classified as a natural meteoroid; events involving artificial objects or reentry vehicles do not qualify.

The primary resolution source will be the NASA JPL Fireball and Bolide Data repository: https://cneos.jpl.nasa.gov/fireballs/. The relevant field for determining impact energy is the “Impact Energy (kt)” column. If this dataset has not been updated to include all relevant dates by February 28, 2026, or if the NASA JPL Fireball and Bolide Data repository becomes permanently unavailable, this market may resolve based on a consensus of credible sources including the European Space Agency (ESA), the International Asteroid Warning Network (IAWN), the U.S. Department of Defense, or credible reporting of a scientific consensus, such as a NASA press release.

5kt meteor strike in 2025?

This market will resolve to "Yes" if a natural meteoroid (bolide) explodes in Earth's atmosphere with a total impact energy greater or equal to 10 kilotons of TNT equivalent between May 28, and December 31, 2025, 11:59 PM ET. Otherwise, this market will resolve to “No”.

The object must be classified as a natural meteoroid; events involving artificial objects or reentry vehicles do not qualify.

The primary resolution source will be the NASA JPL Fireball and Bolide Data repository: https://cneos.jpl.nasa.gov/fireballs/. The relevant field for determining impact energy is the “Impact Energy (kt)” column. If this dataset has not been updated to include all relevant dates by February 28, 2026, or if the NASA JPL Fireball and Bolide Data repository becomes permanently unavailable, this market may resolve based on a consensus of credible sources including the European Space Agency (ESA), the International Asteroid Warning Network (IAWN), the U.S. Department of Defense, or credible reporting of a scientific consensus, such as a NASA press release.


Major meteor strike (10kt+) in 2025?

This market will resolve to the movie with the second highest 2025 gross once data for December 31 is made available.

Data from the "Gross" column on https://www.boxofficemojo.com/year/2025/?grossesOption=calendarGrosses will be used to resolve this market.

Note: This market is about the movie's domestic calendar gross in 2025 - dates outside of 2025 will not count toward this movie's gross.

In the event of an exact tie the film that comes first alphabetically will be considered the winner.

If there is no final data available by January 7, 2026, 11:59 PM ET, another credible resolution source will be chosen.

Will Lilo and Stitch be the second highest grossing movie of 2025?

This market will resolve to “Yes” if 1 or more earthquakes with a magnitude of 10.0 or higher occur anywhere on Earth between December 8, 2025 12:00 PM ET, and December 31, 2026, 11:59PM ET. Otherwise, this market will resolve to “No”.

The resolution source for this market is the United States Geological Survey (USGS) Earthquake Hazards Program (https://earthquake.usgs.gov/earthquakes/browse/significant.php#sigdef).

If an earthquake of substantial size has occurred within this market's timeframe but not yet appeared on the resolution source, this market may remain open until January 31, 2027, 11:59 PM ET, or until the earthquake in question otherwise appears on the resolution source. If such an earthquake has not appeared on the resolution source by that date, another credible resolution source will be used. 

After a qualifying earthquake is registered, this market will remain open for 24 hours to account for any revisions to its recorded magnitude. After 24 hours, this market will resolve according to the latest provided data.

10.0 or above earthquake before 2027?

This market will resolve to "Yes" if NOAA designates any storm in the Atlantic a hurricane between December 4, 2025, and May 31, 2026. Otherwise, this market will resolve to "No".

The resolution source for this market will be NOAA’s list of named storms during the Atlantic hurricane season (https://www.nhc.noaa.gov/data/tcr/) and/or their data on individual storms.

If there is a potential named storm that has not yet been classified by May 31, 11:59 PM ET, the market may remain open until June 1, 12:00 PM ET to determine if a classification was made prior to midnight.

Will a hurricane form by May 31?

This market will resolve to "Yes" if both of the following conditions prove true at any point in 2025:

1) The "US recession in 2025?" market resolves to "Yes" (https://polymarket.com/event/us-recession-in-2025).

2) The Consumer Price Index (CPI) increases by 5.0% or more over the 12 month period ending in any month between April 2025 and December 2025 according to the US Bureau of Labor Statistics (https://www.bls.gov/bls/news-release/cpi.htm#current)

Otherwise, this market will resolve to "No".

This market will not resolve until all relevant figures are reported for the period of time encompassing December 2025.

The resolution sources for this market will be the NBER, BEA (https://www.bea.gov/data/gdp/gross-domestic-product), and BLS (https://www.bls.gov/bls/news-release/cpi.htm#current), as well as the "US recession in 2025?" market on Polymarket.

US stagflation in 2025?

This market will resolve to "Yes" if the Atlas global browser market share is at least the listed percentage on December 31, 2025. Otherwise, this market will resolve to "No".

The relevant data will be sourced from StatCounter Global Stats, utilizing the following settings: Statistic: Browser; Checked: Desktop, Mobile, Tablet, Console; Region: Worldwide; Period: Daily (https://gs.statcounter.com/browser-market-share#daily-20251014-20251020).

Only the first released data will be considered; later revisions will not be used. 

If "Atlas" is not explicitly listed under these settings when data for this date is first released, this market will resolve to "No".

If the data is not reported by January 15, 2026, at 11:59 p.m. ET, or if the primary resolution source becomes permanently unavailable, an alternative resolution source will be selected.

Atlas global browser market share 1%+ on December 31?

This market will resolve to “Yes” if the Consumer Price Index (CPI) increased by greater than the listed percent over the 12 month period ending with any month in 2026 according to the monthly Bureau of Labor Statistics (BLS) reports. Otherwise, this market will resolve to "No".

The resolution source for this market will be the BLS Consumer Price Index reports released for each month of 2026 (https://www.bls.gov/bls/news-release/cpi.htm). Resolution of this market will take place upon release of the aforementioned data.

This market may not resolve to "No" until the December 2026 report is issued. Once the December 2026 report is issued, any revisions to previously released CPI figures will not be counted toward this market's resolution. If the CPI report for December 2026 is not issued by January 31, 2027, 11:59 PM ET, this market will resolve based on CPI figures which have already been made available by the BLS.

Note: the resolution source for this market will be the official monthly BLS CPI news release which reports inflation over 12 month periods to only one decimal point (e.g. 2.9%). Thus, this is the level of precision that will be used when resolving the market.

Will inflation reach more than 3% in 2026?

This market will resolve to “Yes” if the listed city records a daily snowfall of at least 0.1 inches for any day between December 1 and December 31, 2025, as recorded by the National Weather Service (NWS). Otherwise this market will resolve to “No”.

If a daily snowfall of at least 0.1 inches is recorded by the National Weather Service for the listed city, this market will resolve immediately to “Yes”. If no such snowfall has been recorded, this market may not resolve until the NWS Daily Climate Report for the listed city for December 31, 2025 has been published.

The relevant National Weather Service locations for this market will be Central Park NY (New York City), Dallas/Fort Worth, TX (Dallas), Miami, FL (Miami), Seattle-Tacoma, WA (Seattle), Washington-National (Washington D.C.), Phoenix, AZ (Phoenix), Philadelphia, PA (Philadelphia), Atlanta, GA (Atlanta), Boston (Logan Airport), MA (Boston), and Pittsburgh, PA (Pittsburgh).

The resolution source for this market will be the National Weather Service, specifically the figure for  "SNOWFALL (IN)" when "Daily Climate Report (CLI)"  is selected under "Observed Weather" after navigating to the relevant city & location from https://www.weather.gov/wrh/climate.

Will it Snow in Seattle this December?

This market will resolve to "Yes" if The Second Coming of Jesus Christ occurs by December 31, 2025, 11:59 PM ET. Otherwise, this market will resolve to "No".

The resolution source for this market will be a consensus of credible sources.

Will Jesus Christ return in 2025?

This market will resolve to "Yes" if the next Canadian federal election is officially scheduled for a date prior to October 2029, by December 31, 2025, 11:59 PM ET. Otherwise, this market will resolve to "No".

For this market to resolve to "Yes" it is only necessary that the election date be declared, not that the election actually occur within the market timeframe. (e.g. if on December 23, 2025 an election is scheduled for April 23, 2026, this market will resolve to "Yes").

The primary resolution source for this market will be official information from the government of the Canada, However a consensus of credible reporting will also be used.

Another Canada election called in 2025?

This market will resolve to "Yes" if conclusive proof that the earth is flat becomes public by December 31, 2025, 11:59 PM ET. Otherwise, this market will resolve to "No".

The resolution source for this market will be a consensus of credible reporting.

Is Earth flat?

This market will resolve according to the team that wins the 2025-2026 Big 10 Men's Basketball Regular Season Championship.

If two or more teams tie for the regular season championship, this market will resolve according to the team which receives a higher seed for the 2026 Big 10 Men's Basketball conference tournament.

If at any point it becomes impossible for a team to win the 2025-2026 Big 10 Men's Basketball Regular Season Championship based on the rules of the Big 10 or NCAA (e.g., they are mathematically eliminated), the corresponding market will immediately resolve to "No" for that team.

If for any reason no 2025-2026 Big 10 Men's Basketball regular season champion is declared by April 31, 2026, 11:59 PM ET, this market will resolve to "Other".

Official resolution will be based on the Big 10's official Men's Basketball results, as published on bigten.org or NCAA.com, however a consensus of credible reporting may also be used.

Will Michigan State win the 2025-2026 Big 10 Men's Basketball regular season championship?

The IPCA (t. Broad National Consumer Price Index) is the official inflation rate measure used by the Brazilian government, tracked by the Brazilian Institute of Geography and Statistics (IBGE). The IPCA reflects the cost of living for households across urban areas in Brazil, measuring changes in prices for a diverse set of goods and services.

This market will resolve to “Yes” if the 12-month IPCA for December 2025 is below 5.50%. Otherwise, this market will resolve to “No”.

This market will resolve according to IBGE's (https://www.ibge.gov.br/en/indicators#ipca) public release of 12 month IPCA figure for December 2025, expected in January 2026. If the publication of this figure is delayed beyond February 28, 2026 ET, this market will resolve according to the last published figure.

Because this market's resolution source reports inflation over 12 month periods to two decimal points (e.g. 4.56%), this is the level of precision that will be used when resolving the market.

Brazil’s 12-month inflation below 5.50% for December 2025?

This is a market about the variation of consumer prices in the Eurozone over the 12-month period ending November 2025 as reported by Eurostat.

This market will resolve according to the number the Harmonised Index of Consumer Prices (HICP) increased by over the 12-month period ending November 2025 (% change) according to the monthly Eurostat report.

The resolution source for this market will be the Eurostat Harmonised Index of Consumer Prices monthly report released for November 2025, currently scheduled to be released on December 17, 2025. Resolution of this market will take place upon release of the aforementioned data. If no data for the specified month is released by the date the next month's data is scheduled to be released, this market will resolve based on data from the last available month.

Market resolution will be based on the  "Euro area - 20 countries (from 2023)" figure for the "HICP - monthly data (annual rate of change)," available on the Eurostat website (https://ec.europa.eu/eurostat/databrowser/view/prc_hicp_manr/default/table?lang=en&category=prc.prc_hicp).

Note: the resolution source for this market will be the official monthly Eurostat HICP news release which reports inflation change over 12-month periods to only one decimal point (e.g. 1.9%). Thus, this is the level of precision that will be used when resolving the market. For the full release schedule, see: https://ec.europa.eu/eurostat/web/main/news/release-calendar

Will the Eurozone's annual inflation increase by ≤2.3% in November?

This is a market about the variation of consumer prices over the 12-month period ending December 2025 in Canada, before seasonal adjustment, as reported by Statistics Canada.

This market will resolve according to the number the Consumer Price Index (CPI) increased by over the 12-month period ending December 2025 (% change) according to the monthly Statistics Canada report.

The resolution source for this market will be the Statistics Canada Consumer Price Index monthly report released for December 2025 (https://www.statcan.gc.ca/en/start), currently scheduled to be released on January 19, 2026. Resolution of this market will take place upon release of the aforementioned data. If no data for the specified month is released by the date the next month's data is scheduled to be released, this market will resolve based on data from the last available month.

You can find this report by clicking on the “Consumer Price Index” option under the "Key Indicators" heading on the home page of https://www.statcan.gc.ca/en/start and selecting "Table 1". The relevant figure can be found under the "% change" column for the relevant month and year compared to the same month of the previous year.

Note: the resolution source for this market will be the official monthly Statistics Canada CPI news release which reports inflation change over 12-month periods to only one decimal point (e.g. 1.9%). Thus, this is the level of precision that will be used when resolving the market. For the full release schedule, see: https://www150.statcan.gc.ca/n1/dai-quo/cal1-eng.htm?sk=3665

Will Canada's annual inflation increase by 2.3% in December?

This is a market about the monthly variation of consumer prices in the U.K., before seasonal adjustment, as reported by the Office for National Statistics (ONS).

This market will resolve according to the number the Consumer Price Index (CPI) increased in November 2025 (% change) according to the monthly ONS report.

The resolution source for this market will be the ONS Consumer Price Index monthly report released for November 2025 (https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/consumerpriceinflation/previousreleases), currently scheduled to be released on December 17, 2025. Resolution of this market will take place upon release of the aforementioned data. If no data for the specified month is released by the date the next month's data is scheduled to be released, this market will resolve based on data from the last available month.

Note: the resolution source for this market will be the official monthly ONS CPI news release which reports monthly inflation change to only one decimal point (e.g. 1.9%). Thus, this is the level of precision that will be used when resolving the market. For the full release schedule, see: https://www.ons.gov.uk/releasecalendar

Will the U.K.'s monthly inflation increase by ≤0.1% in November?

This market will resolve to 'Yes' if the seasonally adjusted and annualized GDP 'Advance Estimate' for Q3 2025, scheduled for release by the U.S. Bureau of Economic Analysis (BEA) on October 30, 2025, reports a growth rate of -5% or lower. Otherwise, this market will resolve to 'No'.

The GDP release will be available at: https://www.bea.gov/data/gdp/gross-domestic-product.

Only the first available GDP report labeled as the 'Advance Estimate' will be used for resolution. Any subsequent revisions or updates to the data will not be considered.

5% GDP contraction in Q3 2025?  

This market will resolve to "Yes" if the Bureau of Labor Statistics fails to release any monthly report on the Consumer Price Index by 11:59PM ET on the scheduled release date between December 1, 2025 and December 31, 2026, 11:59PM ET. Otherwise, this market will resolve to "No".

If an announcement is made by the White House or the BLS that the monthly CPI release will be delayed or cancelled altogether, this market will immediately resolve to "Yes".

The resolution source for this market will be information from the BLS or a consensus of credible reporting. 

2025 October 1st, 2nd, 3rd hottest on record?

2nd hottest
$44,927 Vol.
No

Lower
$16,343 Vol.
No

1st hottest
$91,275 Vol.
No

3rd hottest
$38,010 Vol.
Yes

Market Context

2025 October 1st, 2nd, 3rd hottest on record?

Rules

2025 October 1st, 2nd, 3rd hottest on record?

Market Context

2025 October 1st, 2nd, 3rd hottest on record?

About

Related

2025 October 1st, 2nd, 3rd hottest on record?

2nd hottest$44,927 Vol.Nocircle xmark

Lower$16,343 Vol.Nocircle xmark

1st hottest$91,275 Vol.Nocircle xmark

3rd hottest$38,010 Vol.Yescircle check

Market Context

2025 October 1st, 2nd, 3rd hottest on record?

Rules

2025 October 1st, 2nd, 3rd hottest on record?

Market Context

2025 October 1st, 2nd, 3rd hottest on record?

About

Related

2nd hottest
$44,927 Vol.
No

Lower
$16,343 Vol.
No

1st hottest
$91,275 Vol.
No

3rd hottest
$38,010 Vol.
Yes