Trader consensus on Polymarket heavily favors a Sao Paulo high of 30°C (42.5% implied probability), driven by the latest forecasts from Brazil's INMET and international models like ECMWF, projecting peak afternoon temperatures around 30°C under persistent high-pressure subsidence inhibiting cloud formation and rainfall. March climatology in Sao Paulo typically sees highs of 28-30°C, aligning with this outlook amid ongoing dry season influences from the South Atlantic subtropical high. Recent developments, including yesterday's 31°C high and minimal overnight cooling to 22°C, reinforce warming trends, while ensemble model spreads narrow toward 29-31°C, sidelining extremes below 28°C or above 32°C due to stable atmospheric conditions. Upcoming hourly observations from official stations will sharpen resolution.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Sao Paulo on March 25?
Highest temperature in Sao Paulo on March 25?
30°C 43%
29°C 28%
31°C 16%
28°C 11%
$17,941 Vol.
$17,941 Vol.
24°C or below
<1%
25°C
<1%
26°C
1%
27°C
1%
28°C
11%
29°C
28%
30°C
43%
31°C
16%
32°C
4%
33°C
<1%
34°C or higher
<1%
30°C 43%
29°C 28%
31°C 16%
28°C 11%
$17,941 Vol.
$17,941 Vol.
24°C or below
<1%
25°C
<1%
26°C
1%
27°C
1%
28°C
11%
29°C
28%
30°C
43%
31°C
16%
32°C
4%
33°C
<1%
34°C or higher
<1%
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 21, 2026, 6:01 AM ET
Resolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Trader consensus on Polymarket heavily favors a Sao Paulo high of 30°C (42.5% implied probability), driven by the latest forecasts from Brazil's INMET and international models like ECMWF, projecting peak afternoon temperatures around 30°C under persistent high-pressure subsidence inhibiting cloud formation and rainfall. March climatology in Sao Paulo typically sees highs of 28-30°C, aligning with this outlook amid ongoing dry season influences from the South Atlantic subtropical high. Recent developments, including yesterday's 31°C high and minimal overnight cooling to 22°C, reinforce warming trends, while ensemble model spreads narrow toward 29-31°C, sidelining extremes below 28°C or above 32°C due to stable atmospheric conditions. Upcoming hourly observations from official stations will sharpen resolution.
Experimental AI-generated summary referencing Polymarket data · Updated
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