Persistent instability from a continental low-pressure system is driving cloud cover, widespread showers, and thunderstorms across São Paulo, limiting daytime heating and keeping the maximum temperature near 21–23 °C. Official guidance from the CGE and IPMet highlights reduced insolation under overcast skies, with rain-cooled boundary layers and northeasterly flow further moderating peaks. Historical September averages near 25 °C contrast with today’s suppressed profile, while model consensus shows only modest afternoon recovery before evening convection intensifies. Traders weigh these factors against slight forecast spreads in maximum readings, producing tightly bunched probabilities for 22 °C and 23 °C outcomes.
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 9?
Highest temperature in Sao Paulo on September 9?
22°C 30%
21°C 24%
23°C 22%
20°C 12%
$17,007 Vol.
$17,007 Vol.
Sep 9, 2026
15°C or below
<1%
16°C
<1%
17°C
<1%
18°C
1%
19°C
3%
20°C
12%
21°C
24%
22°C
30%
23°C
22%
24°C
11%
25°C or higher
5%
22°C 30%
21°C 24%
23°C 22%
20°C 12%
$17,007 Vol.
$17,007 Vol.
Sep 9, 2026
15°C or below
$1,333 Vol.
<1%
16°C
$1,238 Vol.
<1%
17°C
$1,677 Vol.
<1%
18°C
$1,259 Vol.
1%
19°C
$713 Vol.
3%
20°C
$766 Vol.
12%
21°C
$1,318 Vol.
24%
22°C
$2,643 Vol.
30%
23°C
$2,181 Vol.
22%
24°C
$1,871 Vol.
11%
25°C or higher
$2,006 Vol.
5%
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 9 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 instability from a continental low-pressure system is driving cloud cover, widespread showers, and thunderstorms across São Paulo, limiting daytime heating and keeping the maximum temperature near 21–23 °C. Official guidance from the CGE and IPMet highlights reduced insolation under overcast skies, with rain-cooled boundary layers and northeasterly flow further moderating peaks. Historical September averages near 25 °C contrast with today’s suppressed profile, while model consensus shows only modest afternoon recovery before evening convection intensifies. Traders weigh these factors against slight forecast spreads in maximum readings, producing tightly bunched probabilities for 22 °C and 23 °C outcomes.
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 9 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 7, 2026, 8:55 AM ET
Volume
$17,007End Date
Sep 9, 2026Market Opened
Sep 7, 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 9 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 instability from a continental low-pressure system is driving cloud cover, widespread showers, and thunderstorms across São Paulo, limiting daytime heating and keeping the maximum temperature near 21–23 °C. Official guidance from the CGE and IPMet highlights reduced insolation under overcast skies, with rain-cooled boundary layers and northeasterly flow further moderating peaks. Historical September averages near 25 °C contrast with today’s suppressed profile, while model consensus shows only modest afternoon recovery before evening convection intensifies. Traders weigh these factors against slight forecast spreads in maximum readings, producing tightly bunched probabilities for 22 °C and 23 °C outcomes.
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 9 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
$17,007End Date
Sep 9, 2026Market Opened
Sep 7, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...Persistent instability from a continental low-pressure system is driving cloud cover, widespread showers, and thunderstorms across São Paulo, limiting daytime heating and keeping the maximum temperature near 21–23 °C. Official guidance from the CGE and IPMet highlights reduced insolation under overcast skies, with rain-cooled boundary layers and northeasterly flow further moderating peaks. Historical September averages near 25 °C contrast with today’s suppressed profile, while model consensus shows only modest afternoon recovery before evening convection intensifies. Traders weigh these factors against slight forecast spreads in maximum readings, producing tightly bunched probabilities for 22 °C and 23 °C outcomes.
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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