Official observations from São Paulo-Guarulhos International Airport, the market's designated resolution source via Weather Underground, recorded a maximum temperature of precisely 30°C on April 17, 2026, driving the 100% implied probability on that outcome as traders await final data confirmation. Dry autumn conditions under a persistent high-pressure system suppressed cloud cover and humidity, enabling daytime heating to this level despite typical April highs averaging 25-26°C at urban stations; airport exposures often yield 2-4°C warmer readings in stable anticyclonic flow. Forecast models from INMET had projected 29-30°C peaks, aligning closely with observations. Realistic challenges would require post-finalization revisions to airport data—highly unlikely given standardized measurement protocols—or discrepancies across secondary stations, but current evidence overwhelmingly supports resolution to 30°C.
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 April 17?
Highest temperature in Sao Paulo on April 17?
30°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$69,804 Vol.
$69,804 Vol.
Apr 17, 2026
24°C or below
No
25°C
No
26°C
No
27°C
No
28°C
No
29°C
No
30°C
Yes
31°C
No
32°C
No
33°C
No
34°C or higher
No
30°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$69,804 Vol.
$69,804 Vol.
Apr 17, 2026
24°C or below
$8,953 Vol.
No
25°C
$2,973 Vol.
No
26°C
$3,178 Vol.
No
27°C
$3,978 Vol.
No
28°C
$12,192 Vol.
No
29°C
$13,238 Vol.
No
30°C
$8,995 Vol.
Yes
31°C
$8,686 Vol.
No
32°C
$3,686 Vol.
No
33°C
$1,952 Vol.
No
34°C or higher
$1,972 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 17 Apr '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 São Paulo-Guarulhos International Airport, the market's designated resolution source via Weather Underground, recorded a maximum temperature of precisely 30°C on April 17, 2026, driving the 100% implied probability on that outcome as traders await final data confirmation. Dry autumn conditions under a persistent high-pressure system suppressed cloud cover and humidity, enabling daytime heating to this level despite typical April highs averaging 25-26°C at urban stations; airport exposures often yield 2-4°C warmer readings in stable anticyclonic flow. Forecast models from INMET had projected 29-30°C peaks, aligning closely with observations. Realistic challenges would require post-finalization revisions to airport data—highly unlikely given standardized measurement protocols—or discrepancies across secondary stations, but current evidence overwhelmingly supports resolution to 30°C.
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 17 Apr '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: Apr 15, 2026, 12:05 AM ET
Volume
$69,804End Date
Apr 17, 2026Market Opened
Apr 15, 2026, 12:05 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 17 Apr '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 São Paulo-Guarulhos International Airport, the market's designated resolution source via Weather Underground, recorded a maximum temperature of precisely 30°C on April 17, 2026, driving the 100% implied probability on that outcome as traders await final data confirmation. Dry autumn conditions under a persistent high-pressure system suppressed cloud cover and humidity, enabling daytime heating to this level despite typical April highs averaging 25-26°C at urban stations; airport exposures often yield 2-4°C warmer readings in stable anticyclonic flow. Forecast models from INMET had projected 29-30°C peaks, aligning closely with observations. Realistic challenges would require post-finalization revisions to airport data—highly unlikely given standardized measurement protocols—or discrepancies across secondary stations, but current evidence overwhelmingly supports resolution to 30°C.
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 17 Apr '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
$69,804End Date
Apr 17, 2026Market Opened
Apr 15, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations from São Paulo-Guarulhos International Airport, the market's designated resolution source via Weather Underground, recorded a maximum temperature of precisely 30°C on April 17, 2026, driving the 100% implied probability on that outcome as traders await final data confirmation. Dry autumn conditions under a persistent high-pressure system suppressed cloud cover and humidity, enabling daytime heating to this level despite typical April highs averaging 25-26°C at urban stations; airport exposures often yield 2-4°C warmer readings in stable anticyclonic flow. Forecast models from INMET had projected 29-30°C peaks, aligning closely with observations. Realistic challenges would require post-finalization revisions to airport data—highly unlikely given standardized measurement protocols—or discrepancies across secondary stations, but current evidence overwhelmingly supports resolution to 30°C.
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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