Trader consensus on Polymarket tilts toward a Sao Paulo high of 31°C (29.5% implied probability), closely trailed by 30°C (23.5%) and 29°C (18%), reflecting ensemble forecasts from Brazil's INMET and international models like ECMWF showing peak afternoon temperatures in the 29-32°C range amid a persistent subtropical ridge. Differentiating factors include low convective activity—minimal thunderstorm risk per current soundings—favoring 31-32°C over cooler 29°C outcomes, while urban heat island effects and light southerly winds could push maxima higher; historical March averages hover at 28°C, but recent dry spells have elevated baselines. Key watch: tomorrow's 12Z model runs for refined guidance before measurement at official stations.
Resumen experimental generado por IA con datos de Polymarket · ActualizadoHighest temperature in Sao Paulo on March 22?
Highest temperature in Sao Paulo on March 22?
31°C 30%
30°C 24%
29°C 18%
32°C 17%
24°C or below
4%
25°C
2%
26°C
3%
27°C
2%
28°C
9%
29°C
18%
30°C
24%
31°C
30%
32°C
17%
33°C
6%
34°C or higher
3%
31°C 30%
30°C 24%
29°C 18%
32°C 17%
24°C or below
4%
25°C
2%
26°C
3%
27°C
2%
28°C
9%
29°C
18%
30°C
24%
31°C
30%
32°C
17%
33°C
6%
34°C or higher
3%
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.
Mercado abierto: 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 tilts toward a Sao Paulo high of 31°C (29.5% implied probability), closely trailed by 30°C (23.5%) and 29°C (18%), reflecting ensemble forecasts from Brazil's INMET and international models like ECMWF showing peak afternoon temperatures in the 29-32°C range amid a persistent subtropical ridge. Differentiating factors include low convective activity—minimal thunderstorm risk per current soundings—favoring 31-32°C over cooler 29°C outcomes, while urban heat island effects and light southerly winds could push maxima higher; historical March averages hover at 28°C, but recent dry spells have elevated baselines. Key watch: tomorrow's 12Z model runs for refined guidance before measurement at official stations.
Resumen experimental generado por IA con datos de Polymarket · Actualizado
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