Recent official forecasts from agencies and models indicate a maximum temperature of 16–17°C for São Paulo on September 13, driven by persistent cloud cover, widespread showers, and southeasterly winds advecting cooler maritime air. This setup suppresses daytime heating below seasonal norms, with historical September averages near 23°C. Minor variations in shower timing and intensity across ensemble runs create the tight clustering around 16°C and 17°C outcomes, while the low odds for 18°C or higher reflect limited potential for breaks in the overcast. Updated model guidance and real-time observations ahead of peak afternoon hours will refine the exact maximum.
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 13?
Highest temperature in Sao Paulo on September 13?
17°C 34%
16°C 25%
18°C 21%
15°C 9%
NEW
NEW
Sep 13, 2026
12°C or below
1%
13°C
1%
14°C
4%
15°C
9%
16°C
25%
17°C
34%
18°C
21%
19°C
5%
20°C
3%
21°C
1%
22°C or higher
1%
17°C 34%
16°C 25%
18°C 21%
15°C 9%
NEW
NEW
Sep 13, 2026
12°C or below
$1,575 Vol.
1%
13°C
$780 Vol.
1%
14°C
$85 Vol.
4%
15°C
$1,092 Vol.
9%
16°C
$591 Vol.
25%
17°C
$545 Vol.
34%
18°C
$319 Vol.
21%
19°C
$486 Vol.
5%
20°C
$50 Vol.
3%
21°C
$243 Vol.
1%
22°C or higher
$587 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 13 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.Recent official forecasts from agencies and models indicate a maximum temperature of 16–17°C for São Paulo on September 13, driven by persistent cloud cover, widespread showers, and southeasterly winds advecting cooler maritime air. This setup suppresses daytime heating below seasonal norms, with historical September averages near 23°C. Minor variations in shower timing and intensity across ensemble runs create the tight clustering around 16°C and 17°C outcomes, while the low odds for 18°C or higher reflect limited potential for breaks in the overcast. Updated model guidance and real-time observations ahead of peak afternoon hours will refine the exact maximum.
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 13 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 11, 2026, 8:55 AM ET
Volume
$6,353End Date
Sep 13, 2026Market Opened
Sep 11, 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 13 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.Recent official forecasts from agencies and models indicate a maximum temperature of 16–17°C for São Paulo on September 13, driven by persistent cloud cover, widespread showers, and southeasterly winds advecting cooler maritime air. This setup suppresses daytime heating below seasonal norms, with historical September averages near 23°C. Minor variations in shower timing and intensity across ensemble runs create the tight clustering around 16°C and 17°C outcomes, while the low odds for 18°C or higher reflect limited potential for breaks in the overcast. Updated model guidance and real-time observations ahead of peak afternoon hours will refine the exact maximum.
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 13 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
$6,353End Date
Sep 13, 2026Market Opened
Sep 11, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...Recent official forecasts from agencies and models indicate a maximum temperature of 16–17°C for São Paulo on September 13, driven by persistent cloud cover, widespread showers, and southeasterly winds advecting cooler maritime air. This setup suppresses daytime heating below seasonal norms, with historical September averages near 23°C. Minor variations in shower timing and intensity across ensemble runs create the tight clustering around 16°C and 17°C outcomes, while the low odds for 18°C or higher reflect limited potential for breaks in the overcast. Updated model guidance and real-time observations ahead of peak afternoon hours will refine the exact maximum.
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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