Trader consensus on Polymarket overwhelmingly favors 30°C (100%) as the highest temperature in São Paulo on March 28, 2026, backed by official observations from the Instituto Nacional de Meteorologia (INMET) and São Paulo-Guarulhos International Airport's meteorological station, which recorded a peak of precisely 30°C amid sunny conditions with few clouds and highs aligning with short-range forecast models. This positioning reflects stable high-pressure systems suppressing cloud cover and allowing daytime heating to that level, consistent with March climatology where averages hover around 27–28°C but can spike under clear skies. Realistic challenges are minimal post-measurement—only a formal data revision from INMET due to sensor recalibration or station-specific disputes could shift it, though such events are exceedingly rare given the market's near-resolution proximity.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Sao Paulo on March 28?
Highest temperature in Sao Paulo on March 28?
30°C 100.0%
31°C <1%
32°C <1%
33°C <1%
$110,747 Vol.
$110,747 Vol.
30°C
100%
31°C
<1%
32°C
<1%
33°C
<1%
34°C or higher
<1%
30°C 100.0%
31°C <1%
32°C <1%
33°C <1%
$110,747 Vol.
$110,747 Vol.
30°C
100%
31°C
<1%
32°C
<1%
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 24, 2026, 6:01 AM ET
Resolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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...Outcome proposed: No
No dispute
Final outcome: No
Trader consensus on Polymarket overwhelmingly favors 30°C (100%) as the highest temperature in São Paulo on March 28, 2026, backed by official observations from the Instituto Nacional de Meteorologia (INMET) and São Paulo-Guarulhos International Airport's meteorological station, which recorded a peak of precisely 30°C amid sunny conditions with few clouds and highs aligning with short-range forecast models. This positioning reflects stable high-pressure systems suppressing cloud cover and allowing daytime heating to that level, consistent with March climatology where averages hover around 27–28°C but can spike under clear skies. Realistic challenges are minimal post-measurement—only a formal data revision from INMET due to sensor recalibration or station-specific disputes could shift it, though such events are exceedingly rare given the market's near-resolution proximity.
Experimental AI-generated summary referencing Polymarket data · Updated



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