Persistent cloud cover, light rain, and southerly flow have suppressed temperatures in São Paulo on September 13, 2026, keeping the daily high well below the seasonal average of 23–25°C. Official forecasts and observational data from multiple sources converge on a maximum of 16–17°C under overcast skies with minimal solar heating and dew points near 13–14°C. This cool anomaly, driven by a passing weather system, underpins the market's strong consensus around 17°C while assigning low probability to warmer outcomes that would require unexpected clearing. Traders are monitoring any late-day breaks in cloud cover that could nudge readings slightly higher before resolution.
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 56%
16°C 18%
18°C 17%
19°C 4%
NEW
$41,304 Vol.
NEW
$41,304 Vol.
Sep 13, 2026
12°C or below
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
18%
17°C
56%
18°C
17%
19°C
4%
20°C
2%
21°C
<1%
22°C or higher
<1%
17°C 56%
16°C 18%
18°C 17%
19°C 4%
NEW
$41,304 Vol.
NEW
$41,304 Vol.
Sep 13, 2026
12°C or below
$4,787 Vol.
<1%
13°C
$4,376 Vol.
<1%
14°C
$1,592 Vol.
<1%
15°C
$21,679 Vol.
<1%
16°C
$2,202 Vol.
18%
17°C
$934 Vol.
56%
18°C
$830 Vol.
17%
19°C
$859 Vol.
4%
20°C
$1,024 Vol.
2%
21°C
$826 Vol.
<1%
22°C or higher
$2,300 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.Persistent cloud cover, light rain, and southerly flow have suppressed temperatures in São Paulo on September 13, 2026, keeping the daily high well below the seasonal average of 23–25°C. Official forecasts and observational data from multiple sources converge on a maximum of 16–17°C under overcast skies with minimal solar heating and dew points near 13–14°C. This cool anomaly, driven by a passing weather system, underpins the market's strong consensus around 17°C while assigning low probability to warmer outcomes that would require unexpected clearing. Traders are monitoring any late-day breaks in cloud cover that could nudge readings slightly higher before resolution.
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
$41,304End 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.Persistent cloud cover, light rain, and southerly flow have suppressed temperatures in São Paulo on September 13, 2026, keeping the daily high well below the seasonal average of 23–25°C. Official forecasts and observational data from multiple sources converge on a maximum of 16–17°C under overcast skies with minimal solar heating and dew points near 13–14°C. This cool anomaly, driven by a passing weather system, underpins the market's strong consensus around 17°C while assigning low probability to warmer outcomes that would require unexpected clearing. Traders are monitoring any late-day breaks in cloud cover that could nudge readings slightly higher before resolution.
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
$41,304End Date
Sep 13, 2026Market Opened
Sep 11, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...Persistent cloud cover, light rain, and southerly flow have suppressed temperatures in São Paulo on September 13, 2026, keeping the daily high well below the seasonal average of 23–25°C. Official forecasts and observational data from multiple sources converge on a maximum of 16–17°C under overcast skies with minimal solar heating and dew points near 13–14°C. This cool anomaly, driven by a passing weather system, underpins the market's strong consensus around 17°C while assigning low probability to warmer outcomes that would require unexpected clearing. Traders are monitoring any late-day breaks in cloud cover that could nudge readings slightly higher before resolution.
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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