Recent forecasts from multiple meteorological services indicate a cool, overcast day in São Paulo on September 9, 2026, with widespread rain and cloud cover expected to limit daytime heating following a polar air mass intrusion earlier in the week. Official guidance points to maximum temperatures centered in the low 20s °C, consistent with the market's tight clustering around 22–23 °C outcomes, while suppressed insolation and elevated humidity reduce the likelihood of reaching 24 °C or higher. Key variables include the precise timing and intensity of showers, which could further cap peaks if persistent, versus any brief clearing that might allow modest warming; historical early-September baselines near 24–25 °C underscore how this transient cool spell has shifted probabilities downward. With resolution hinging on official station readings, traders are weighting ensemble model consensus and short-range updates heavily amid the observed spread in 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?
23°C 29%
22°C 20%
24°C 14%
20°C 12%
NEW
NEW
Sep 9, 2026
15°C or below
<1%
16°C
<1%
17°C
3%
18°C
2%
19°C
3%
20°C
12%
21°C
12%
22°C
20%
23°C
29%
24°C
14%
25°C or higher
7%
23°C 29%
22°C 20%
24°C 14%
20°C 12%
NEW
NEW
Sep 9, 2026
15°C or below
$323 Vol.
<1%
16°C
$125 Vol.
<1%
17°C
$0 Vol.
3%
18°C
$26 Vol.
2%
19°C
$0 Vol.
3%
20°C
$54 Vol.
12%
21°C
$70 Vol.
12%
22°C
$75 Vol.
20%
23°C
$28 Vol.
29%
24°C
$18 Vol.
14%
25°C or higher
$46 Vol.
7%
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.Recent forecasts from multiple meteorological services indicate a cool, overcast day in São Paulo on September 9, 2026, with widespread rain and cloud cover expected to limit daytime heating following a polar air mass intrusion earlier in the week. Official guidance points to maximum temperatures centered in the low 20s °C, consistent with the market's tight clustering around 22–23 °C outcomes, while suppressed insolation and elevated humidity reduce the likelihood of reaching 24 °C or higher. Key variables include the precise timing and intensity of showers, which could further cap peaks if persistent, versus any brief clearing that might allow modest warming; historical early-September baselines near 24–25 °C underscore how this transient cool spell has shifted probabilities downward. With resolution hinging on official station readings, traders are weighting ensemble model consensus and short-range updates heavily amid the observed spread in 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
$765End 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.Recent forecasts from multiple meteorological services indicate a cool, overcast day in São Paulo on September 9, 2026, with widespread rain and cloud cover expected to limit daytime heating following a polar air mass intrusion earlier in the week. Official guidance points to maximum temperatures centered in the low 20s °C, consistent with the market's tight clustering around 22–23 °C outcomes, while suppressed insolation and elevated humidity reduce the likelihood of reaching 24 °C or higher. Key variables include the precise timing and intensity of showers, which could further cap peaks if persistent, versus any brief clearing that might allow modest warming; historical early-September baselines near 24–25 °C underscore how this transient cool spell has shifted probabilities downward. With resolution hinging on official station readings, traders are weighting ensemble model consensus and short-range updates heavily amid the observed spread in 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
$765End Date
Sep 9, 2026Market Opened
Sep 7, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...Recent forecasts from multiple meteorological services indicate a cool, overcast day in São Paulo on September 9, 2026, with widespread rain and cloud cover expected to limit daytime heating following a polar air mass intrusion earlier in the week. Official guidance points to maximum temperatures centered in the low 20s °C, consistent with the market's tight clustering around 22–23 °C outcomes, while suppressed insolation and elevated humidity reduce the likelihood of reaching 24 °C or higher. Key variables include the precise timing and intensity of showers, which could further cap peaks if persistent, versus any brief clearing that might allow modest warming; historical early-September baselines near 24–25 °C underscore how this transient cool spell has shifted probabilities downward. With resolution hinging on official station readings, traders are weighting ensemble model consensus and short-range updates heavily amid the observed spread in 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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