Official observations from Brazil's Instituto Nacional de Meteorologia (INMET) at the São Paulo–Guarulhos International Airport—the market's resolution station—recorded a maximum temperature of 29°C on March 30, 2026, driving unanimous trader consensus at 100% implied probability for that outcome. This aligns with pre-event forecasts anticipating 29–30°C maxima under sunny skies, moderated by increasing cloud cover and proximity to an approaching front that brought light rain later in the day, capping intensification. March 2026 saw persistently above-normal heat in southeast Brazil, with São Paulo's monthly average maximum of 30.3°C (2.3°C above climatological norms), but daily variability from atmospheric patterns prevented higher readings. Final INMET data release could note minor revisions from late-afternoon peaks, though historical precedents show such adjustments are rare below 0.5°C.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Sao Paulo on March 30?
Highest temperature in Sao Paulo on March 30?
29°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$77,039 Vol.
$77,039 Vol.
24°C or below
No
25°C
No
26°C
No
27°C
No
28°C
No
29°C
Yes
30°C
No
31°C
No
32°C
No
33°C
No
34°C or higher
No
29°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$77,039 Vol.
$77,039 Vol.
24°C or below
No
25°C
No
26°C
No
27°C
No
28°C
No
29°C
Yes
30°C
No
31°C
No
32°C
No
33°C
No
34°C or higher
No
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: Mar 29, 2026, 2:00 PM ET
Resolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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.
Resolution 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) at the São Paulo–Guarulhos International Airport—the market's resolution station—recorded a maximum temperature of 29°C on March 30, 2026, driving unanimous trader consensus at 100% implied probability for that outcome. This aligns with pre-event forecasts anticipating 29–30°C maxima under sunny skies, moderated by increasing cloud cover and proximity to an approaching front that brought light rain later in the day, capping intensification. March 2026 saw persistently above-normal heat in southeast Brazil, with São Paulo's monthly average maximum of 30.3°C (2.3°C above climatological norms), but daily variability from atmospheric patterns prevented higher readings. Final INMET data release could note minor revisions from late-afternoon peaks, though historical precedents show such adjustments are rare below 0.5°C.
Experimental AI-generated summary referencing Polymarket data · Updated
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