Trader consensus on Polymarket prices a razor-thin edge for São Paulo's highest temperature at 30°C (35.5%) over 29°C (33.0%), reflecting tight convergence in latest INMET and CPTEC-INPE short-range forecasts amid a persistent high-pressure ridge over southeastern Brazil that promotes clear skies, low humidity, and above-climatological March peaks of 27–28°C. Differentiating factors include the timing and strength of afternoon sea breeze incursions from the nearby Atlantic, which can cap heating by 1–2°C through coastal advection, versus prolonged solar insolation under subsidence if the ridge holds firm. Global models like GFS and ECMWF ensembles show minor divergences—some peaking near 29.5°C, others nudging 30.5°C—while urban heat effects at São Paulo-Guarulhos International Airport add variability. Hourly observations through late afternoon will clarify resolution as models update.
Resumen experimental generado por IA con datos de Polymarket · ActualizadoHighest temperature in Sao Paulo on March 28?
Highest temperature in Sao Paulo on March 28?
30°C 35%
29°C 33%
31°C 14%
28°C 9%
$43,164 Vol.
$43,164 Vol.
24°C or below
<1%
25°C
<1%
26°C
<1%
27°C
2%
28°C
9%
29°C
33%
30°C
35%
31°C
14%
32°C
2%
33°C
1%
34°C or higher
1%
30°C 35%
29°C 33%
31°C 14%
28°C 9%
$43,164 Vol.
$43,164 Vol.
24°C or below
<1%
25°C
<1%
26°C
<1%
27°C
2%
28°C
9%
29°C
33%
30°C
35%
31°C
14%
32°C
2%
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.
Mercado abierto: Mar 24, 2026, 6:01 AM 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 prices a razor-thin edge for São Paulo's highest temperature at 30°C (35.5%) over 29°C (33.0%), reflecting tight convergence in latest INMET and CPTEC-INPE short-range forecasts amid a persistent high-pressure ridge over southeastern Brazil that promotes clear skies, low humidity, and above-climatological March peaks of 27–28°C. Differentiating factors include the timing and strength of afternoon sea breeze incursions from the nearby Atlantic, which can cap heating by 1–2°C through coastal advection, versus prolonged solar insolation under subsidence if the ridge holds firm. Global models like GFS and ECMWF ensembles show minor divergences—some peaking near 29.5°C, others nudging 30.5°C—while urban heat effects at São Paulo-Guarulhos International Airport add variability. Hourly observations through late afternoon will clarify resolution as models update.
Resumen experimental generado por IA con datos de Polymarket · Actualizado
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