Trader consensus on Polymarket tilts strongly toward 30°C (42%) or 29°C (29%) as Sao Paulo's highest temperature on March 25, reflecting ensemble forecasts from GFS and ECMWF models that project afternoon peaks around 29-31°C under a persistent subtropical high-pressure ridge suppressing rainfall. Recent INMET observations show early March warmth with highs averaging 28-30°C, aligning with seasonal autumn norms of 26-29°C but nudged higher by reduced cloud cover and urban heat island effects in the metro area. Divergent model runs introduce uncertainty, with slight downward revisions after yesterday's cooler overnight lows, lowering odds for 31°C+ while elevating sub-30°C probabilities; monitor INMET's 12Z update for resolution-critical refinements.
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 42%
29°C 31%
31°C 15%
28°C 10%
$19,412 Vol.
$19,412 Vol.
24°C or below
<1%
25°C
<1%
26°C
<1%
27°C
1%
28°C
10%
29°C
31%
30°C
42%
31°C
15%
32°C
3%
33°C
<1%
34°C or higher
<1%
30°C 42%
29°C 31%
31°C 15%
28°C 10%
$19,412 Vol.
$19,412 Vol.
24°C or below
<1%
25°C
<1%
26°C
<1%
27°C
1%
28°C
10%
29°C
31%
30°C
42%
31°C
15%
32°C
3%
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 tilts strongly toward 30°C (42%) or 29°C (29%) as Sao Paulo's highest temperature on March 25, reflecting ensemble forecasts from GFS and ECMWF models that project afternoon peaks around 29-31°C under a persistent subtropical high-pressure ridge suppressing rainfall. Recent INMET observations show early March warmth with highs averaging 28-30°C, aligning with seasonal autumn norms of 26-29°C but nudged higher by reduced cloud cover and urban heat island effects in the metro area. Divergent model runs introduce uncertainty, with slight downward revisions after yesterday's cooler overnight lows, lowering odds for 31°C+ while elevating sub-30°C probabilities; monitor INMET's 12Z update for resolution-critical refinements.
Experimental AI-generated summary referencing Polymarket data · Updated
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