**Official meteorological observations from São Paulo stations, including Congonhas Airport (SBSP), recorded a daily maximum of 20°C on September 5, 2026, driving the near-certain market consensus at that level.** A passing cold front and polar air mass produced widespread cloud cover, light showers or drizzle, and suppressed daytime heating, keeping temperatures well below the September climatological average high near 24–25°C. Real-time surface data, pressure readings around 1016 hPa, and southerly winds aligned with model guidance showing limited insolation and rapid cooling after any brief afternoon peaks. This outcome reflects aggregated trader assessment of verified station data rather than forecasts alone. Resolution disputes could theoretically arise from differences between official reporting stations, instrument calibration, or exact timing of the peak reading, though such revisions are rare once preliminary observations are confirmed.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Sao Paulo on September 5?
Highest temperature in Sao Paulo on September 5?
20°C 100.0%
18°C or below <1%
19°C <1%
21°C <1%
$50,981 Vol.
$50,981 Vol.
Sep 5, 2026
18°C or below
<1%
19°C
<1%
20°C
100%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
<1%
25°C
<1%
26°C
<1%
27°C
<1%
28°C or higher
<1%
20°C 100.0%
18°C or below <1%
19°C <1%
21°C <1%
$50,981 Vol.
$50,981 Vol.
Sep 5, 2026
18°C or below
$2,043 Vol.
<1%
19°C
$7,360 Vol.
<1%
20°C
$8,141 Vol.
100%
21°C
$4,307 Vol.
<1%
22°C
$3,465 Vol.
<1%
23°C
$4,372 Vol.
<1%
24°C
$3,306 Vol.
<1%
25°C
$2,755 Vol.
<1%
26°C
$3,218 Vol.
<1%
27°C
$5,095 Vol.
<1%
28°C or higher
$6,924 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 5 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=sbgr
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.**Official meteorological observations from São Paulo stations, including Congonhas Airport (SBSP), recorded a daily maximum of 20°C on September 5, 2026, driving the near-certain market consensus at that level.**
A passing cold front and polar air mass produced widespread cloud cover, light showers or drizzle, and suppressed daytime heating, keeping temperatures well below the September climatological average high near 24–25°C. Real-time surface data, pressure readings around 1016 hPa, and southerly winds aligned with model guidance showing limited insolation and rapid cooling after any brief afternoon peaks.
This outcome reflects aggregated trader assessment of verified station data rather than forecasts alone. Resolution disputes could theoretically arise from differences between official reporting stations, instrument calibration, or exact timing of the peak reading, though such revisions are rare once preliminary observations are confirmed.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 5 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=sbgr
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=sbgr
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Sep 3, 2026, 8:55 AM ET
Volume
$50,981End Date
Sep 5, 2026Market Opened
Sep 3, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 5 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=sbgr
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.**Official meteorological observations from São Paulo stations, including Congonhas Airport (SBSP), recorded a daily maximum of 20°C on September 5, 2026, driving the near-certain market consensus at that level.**
A passing cold front and polar air mass produced widespread cloud cover, light showers or drizzle, and suppressed daytime heating, keeping temperatures well below the September climatological average high near 24–25°C. Real-time surface data, pressure readings around 1016 hPa, and southerly winds aligned with model guidance showing limited insolation and rapid cooling after any brief afternoon peaks.
This outcome reflects aggregated trader assessment of verified station data rather than forecasts alone. Resolution disputes could theoretically arise from differences between official reporting stations, instrument calibration, or exact timing of the peak reading, though such revisions are rare once preliminary observations are confirmed.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 5 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=sbgr
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=sbgr
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$50,981End Date
Sep 5, 2026Market Opened
Sep 3, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...**Official meteorological observations from São Paulo stations, including Congonhas Airport (SBSP), recorded a daily maximum of 20°C on September 5, 2026, driving the near-certain market consensus at that level.** A passing cold front and polar air mass produced widespread cloud cover, light showers or drizzle, and suppressed daytime heating, keeping temperatures well below the September climatological average high near 24–25°C. Real-time surface data, pressure readings around 1016 hPa, and southerly winds aligned with model guidance showing limited insolation and rapid cooling after any brief afternoon peaks. This outcome reflects aggregated trader assessment of verified station data rather than forecasts alone. Resolution disputes could theoretically arise from differences between official reporting stations, instrument calibration, or exact timing of the peak reading, though such revisions are rare once preliminary observations are confirmed.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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