Trader consensus on Polymarket heavily favors a Sao Paulo high near 31°C (27.5% implied probability), driven by the latest ECMWF and GFS ensemble forecasts converging on 30-32°C peaks for March 22, amid a persistent subtropical high-pressure ridge suppressing clouds and boosting insolation. Differentiating factors include urban heat island amplification in the city core—potentially pushing maxima 1-2°C above rural stations—and subtle sea-breeze timing, with GFS runs hinting at early onshore flows capping 30°C while ECMWF delays them for 31-32°C. Historical March 22 averages hover at 28°C (INMET data), but recent +2°C anomalies from La Niña decay add upside risk, tightening odds among top outcomes as models update hourly.
Résumé expérimental généré par IA à partir des données Polymarket · Mis à jourHighest temperature in Sao Paulo on March 22?
Highest temperature in Sao Paulo on March 22?
31°C 29%
30°C 21%
32°C 16%
29°C 16%
24°C or below
1%
25°C
1%
26°C
2%
27°C
2%
28°C
7%
29°C
16%
30°C
21%
31°C
29%
32°C
16%
33°C
6%
34°C or higher
2%
31°C 29%
30°C 21%
32°C 16%
29°C 16%
24°C or below
1%
25°C
1%
26°C
2%
27°C
2%
28°C
7%
29°C
16%
30°C
21%
31°C
29%
32°C
16%
33°C
6%
34°C or higher
2%
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.
Marché ouvert : Mar 18, 2026, 6:02 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 near 31°C (27.5% implied probability), driven by the latest ECMWF and GFS ensemble forecasts converging on 30-32°C peaks for March 22, amid a persistent subtropical high-pressure ridge suppressing clouds and boosting insolation. Differentiating factors include urban heat island amplification in the city core—potentially pushing maxima 1-2°C above rural stations—and subtle sea-breeze timing, with GFS runs hinting at early onshore flows capping 30°C while ECMWF delays them for 31-32°C. Historical March 22 averages hover at 28°C (INMET data), but recent +2°C anomalies from La Niña decay add upside risk, tightening odds among top outcomes as models update hourly.
Résumé expérimental généré par IA à partir des données Polymarket · Mis à jour
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