Trader consensus on Polymarket closely clusters around 29°C (29.5%) and 30°C (28.5%) for São Paulo's highest temperature on April 4, reflecting the latest INMET and CPTEC forecast ensembles showing daytime highs of 28–30°C under a persistent subtropical high-pressure ridge over southeastern Brazil. This slightly above-climatological average (typically 26–27°C early April) stems from recent March warmth, including highs near 31°C mid-month, amid fading La Niña conditions transitioning to ENSO-neutral, which heightens frontal system variability. Differentiating factors include potential pre-frontal heating boosting peaks to 30°C+ versus cloud cover or an early cold front capping at 25–27°C; GFS and ECMWF models diverge by 2–3°C, with daily updates through April 2 critical for resolution based on official airport measurements.
Resumen experimental generado por IA con datos de Polymarket · ActualizadoHighest temperature in Sao Paulo on April 4?
Highest temperature in Sao Paulo on April 4?
25°C or below 36%
29°C 34%
30°C 29%
26°C 19%
25°C or below
36%
26°C
19%
27°C
19%
28°C
19%
29°C
30%
30°C
29%
31°C
18%
32°C
16%
33°C
14%
34°C
13%
35°C or higher
11%
25°C or below 36%
29°C 34%
30°C 29%
26°C 19%
25°C or below
36%
26°C
19%
27°C
19%
28°C
19%
29°C
30%
30°C
29%
31°C
18%
32°C
16%
33°C
14%
34°C
13%
35°C or higher
11%
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 29, 2026, 3:20 PM ET
Resolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...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...Trader consensus on Polymarket closely clusters around 29°C (29.5%) and 30°C (28.5%) for São Paulo's highest temperature on April 4, reflecting the latest INMET and CPTEC forecast ensembles showing daytime highs of 28–30°C under a persistent subtropical high-pressure ridge over southeastern Brazil. This slightly above-climatological average (typically 26–27°C early April) stems from recent March warmth, including highs near 31°C mid-month, amid fading La Niña conditions transitioning to ENSO-neutral, which heightens frontal system variability. Differentiating factors include potential pre-frontal heating boosting peaks to 30°C+ versus cloud cover or an early cold front capping at 25–27°C; GFS and ECMWF models diverge by 2–3°C, with daily updates through April 2 critical for resolution based on official airport measurements.
Resumen experimental generado por IA con datos de Polymarket · Actualizado
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