A passing cold front and persistent southeast winds suppressed daytime warming across Buenos Aires on August 18, 2026, limiting the official maximum to 11°C. This outcome aligned with National Meteorological Service observations and model consensus showing overnight lows near 7–8°C, persistent cloud cover, and moderate winds that prevented typical winter rebound. Average August maxima in the city range 15–17°C, making the cooler reading a clear departure driven by the frontal passage. The market-implied 100% probability on 11°C reflects trader assessment of verified station data and limited upside potential once the front arrived. Only a post-event measurement revision or alternative station selection would alter resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Buenos Aires on August 18?
Highest temperature in Buenos Aires on August 18?
11°C 100.0%
8°C or below <1%
9°C <1%
10°C <1%
$36,900 Vol.
$36,900 Vol.
Aug 18, 2026
8°C or below
No
9°C
No
10°C
No
11°C
Yes
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C or higher
No
11°C 100.0%
8°C or below <1%
9°C <1%
10°C <1%
$36,900 Vol.
$36,900 Vol.
Aug 18, 2026
8°C or below
$625 Vol.
No
9°C
$1,900 Vol.
No
10°C
$1,183 Vol.
No
11°C
$5,804 Vol.
Yes
12°C
$5,983 Vol.
No
13°C
$9,075 Vol.
No
14°C
$6,173 Vol.
No
15°C
$2,515 Vol.
No
16°C
$1,287 Vol.
No
17°C
$1,289 Vol.
No
18°C or higher
$1,065 Vol.
No
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Minister Pistarini Intl Airport Station in degrees Celsius on 18 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Minister Pistarini Intl Airport Station, available here: https://www.wunderground.com/history/daily/ar/ezeiza/SAEZ.
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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.A passing cold front and persistent southeast winds suppressed daytime warming across Buenos Aires on August 18, 2026, limiting the official maximum to 11°C. This outcome aligned with National Meteorological Service observations and model consensus showing overnight lows near 7–8°C, persistent cloud cover, and moderate winds that prevented typical winter rebound. Average August maxima in the city range 15–17°C, making the cooler reading a clear departure driven by the frontal passage. The market-implied 100% probability on 11°C reflects trader assessment of verified station data and limited upside potential once the front arrived. Only a post-event measurement revision or alternative station selection would alter resolution.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Minister Pistarini Intl Airport Station in degrees Celsius on 18 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Minister Pistarini Intl Airport Station, available here: https://www.wunderground.com/history/daily/ar/ezeiza/SAEZ.
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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
This market will resolve to the temperature range that contains the highest temperature recorded at the Minister Pistarini Intl Airport Station in degrees Celsius on 18 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Minister Pistarini Intl Airport Station, available here: https://www.wunderground.com/history/daily/ar/ezeiza/SAEZ.
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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Aug 16, 2026, 9:55 PM ET
Volume
$36,900End Date
Aug 18, 2026Market Opened
Aug 16, 2026, 9:55 PM ETResolution Source
https://www.wunderground.com/history/daily/ar/ezeiza/SAEZResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Minister Pistarini Intl Airport Station in degrees Celsius on 18 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Minister Pistarini Intl Airport Station, available here: https://www.wunderground.com/history/daily/ar/ezeiza/SAEZ.
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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.A passing cold front and persistent southeast winds suppressed daytime warming across Buenos Aires on August 18, 2026, limiting the official maximum to 11°C. This outcome aligned with National Meteorological Service observations and model consensus showing overnight lows near 7–8°C, persistent cloud cover, and moderate winds that prevented typical winter rebound. Average August maxima in the city range 15–17°C, making the cooler reading a clear departure driven by the frontal passage. The market-implied 100% probability on 11°C reflects trader assessment of verified station data and limited upside potential once the front arrived. Only a post-event measurement revision or alternative station selection would alter resolution.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Minister Pistarini Intl Airport Station in degrees Celsius on 18 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Minister Pistarini Intl Airport Station, available here: https://www.wunderground.com/history/daily/ar/ezeiza/SAEZ.
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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
This market will resolve to the temperature range that contains the highest temperature recorded at the Minister Pistarini Intl Airport Station in degrees Celsius on 18 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Minister Pistarini Intl Airport Station, available here: https://www.wunderground.com/history/daily/ar/ezeiza/SAEZ.
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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$36,900End Date
Aug 18, 2026Market Opened
Aug 16, 2026, 9:55 PM ETResolution Source
https://www.wunderground.com/history/daily/ar/ezeiza/SAEZResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
A passing cold front and persistent southeast winds suppressed daytime warming across Buenos Aires on August 18, 2026, limiting the official maximum to 11°C. This outcome aligned with National Meteorological Service observations and model consensus showing overnight lows near 7–8°C, persistent cloud cover, and moderate winds that prevented typical winter rebound. Average August maxima in the city range 15–17°C, making the cooler reading a clear departure driven by the frontal passage. The market-implied 100% probability on 11°C reflects trader assessment of verified station data and limited upside potential once the front arrived. Only a post-event measurement revision or alternative station selection would alter resolution.
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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