Official observations from Brazil's Instituto Nacional de Meteorologia (INMET) confirm that São Paulo's highest temperature on May 10 reached exactly 20°C, as measured at key automatic weather stations including those near Guarulhos International Airport, driving trader consensus to 100% on this outcome. This positioning reflects verified data amid a cold front advancing through the Southeast region, bringing persistent cloud cover, high humidity above 90%, and light showers that capped daytime heating despite typical May highs averaging 23°C. Model forecasts from INMET and Climatempo had projected maxima around 20–22°C, aligning closely with observations. Realistic challenges are minimal but could include post hoc data revisions from outlier sensors validating a slightly higher peak, though INMET's preliminary reports rarely shift after 24 hours.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Sao Paulo on May 10?
Highest temperature in Sao Paulo on May 10?
20°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$87,289 Vol.
$87,289 Vol.
May 10, 2026
13°C or below
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
Yes
21°C
No
22°C
No
23°C or higher
No
20°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$87,289 Vol.
$87,289 Vol.
May 10, 2026
13°C or below
$1,548 Vol.
No
14°C
$3,056 Vol.
No
15°C
$1,822 Vol.
No
16°C
$5,188 Vol.
No
17°C
$5,483 Vol.
No
18°C
$5,683 Vol.
No
19°C
$18,159 Vol.
No
20°C
$21,048 Vol.
Yes
21°C
$8,911 Vol.
No
22°C
$7,293 Vol.
No
23°C or higher
$9,100 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 10 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Official observations from Brazil's Instituto Nacional de Meteorologia (INMET) confirm that São Paulo's highest temperature on May 10 reached exactly 20°C, as measured at key automatic weather stations including those near Guarulhos International Airport, driving trader consensus to 100% on this outcome. This positioning reflects verified data amid a cold front advancing through the Southeast region, bringing persistent cloud cover, high humidity above 90%, and light showers that capped daytime heating despite typical May highs averaging 23°C. Model forecasts from INMET and Climatempo had projected maxima around 20–22°C, aligning closely with observations. Realistic challenges are minimal but could include post hoc data revisions from outlier sensors validating a slightly higher peak, though INMET's preliminary reports rarely shift after 24 hours.
This market will resolve to the temperature range that contains the highest temperature recorded at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 10 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: May 8, 2026, 12:36 AM ET
Volume
$87,289End Date
May 10, 2026Market Opened
May 8, 2026, 12:36 AM ETResolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 10 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Official observations from Brazil's Instituto Nacional de Meteorologia (INMET) confirm that São Paulo's highest temperature on May 10 reached exactly 20°C, as measured at key automatic weather stations including those near Guarulhos International Airport, driving trader consensus to 100% on this outcome. This positioning reflects verified data amid a cold front advancing through the Southeast region, bringing persistent cloud cover, high humidity above 90%, and light showers that capped daytime heating despite typical May highs averaging 23°C. Model forecasts from INMET and Climatempo had projected maxima around 20–22°C, aligning closely with observations. Realistic challenges are minimal but could include post hoc data revisions from outlier sensors validating a slightly higher peak, though INMET's preliminary reports rarely shift after 24 hours.
This market will resolve to the temperature range that contains the highest temperature recorded at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 10 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Volume
$87,289End Date
May 10, 2026Market Opened
May 8, 2026, 12:36 AM ETResolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations from Brazil's Instituto Nacional de Meteorologia (INMET) confirm that São Paulo's highest temperature on May 10 reached exactly 20°C, as measured at key automatic weather stations including those near Guarulhos International Airport, driving trader consensus to 100% on this outcome. This positioning reflects verified data amid a cold front advancing through the Southeast region, bringing persistent cloud cover, high humidity above 90%, and light showers that capped daytime heating despite typical May highs averaging 23°C. Model forecasts from INMET and Climatempo had projected maxima around 20–22°C, aligning closely with observations. Realistic challenges are minimal but could include post hoc data revisions from outlier sensors validating a slightly higher peak, though INMET's preliminary reports rarely shift after 24 hours.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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