**Trader sentiment for Sao Paulo’s September 20 maximum temperature centers on modest values near or below the historical September average high of roughly 23–25 °C (75 °F), with the highest implied probabilities clustered on 21 °C or below (20.5 %), 23 °C (16.5 %), and 22 °C (15.5 %).** Multiple forecast sources issued on September 19 project a daytime peak in the 22–25 °C range under mostly cloudy skies and a 30–85 % chance of light rain or showers, consistent with an unusually wet September pattern that has already produced record rainfall exceeding 250 mm in the first half of the month—nearly three times the climatological norm. Persistent cloud cover and moisture limit solar heating and suppress afternoon temperature rises, while light northerly or variable winds provide little additional warming. Model consensus and recent observations therefore favor a moderate maximum rather than a warm outlier, though small differences in the timing and coverage of showers create the tight spread across the 21–24 °C outcomes visible in market prices.
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 20?
Highest temperature in Sao Paulo on September 20?
21°C or below 21%
23°C 16%
24°C 16%
22°C 16%
NEW
NEW
Sep 20, 2026
21°C or below
21%
22°C
16%
23°C
16%
24°C
16%
25°C
11%
26°C
9%
27°C
8%
28°C
6%
29°C
1%
30°C
<1%
31°C or higher
<1%
21°C or below 21%
23°C 16%
24°C 16%
22°C 16%
NEW
NEW
Sep 20, 2026
21°C or below
$3,924 Vol.
21%
22°C
$742 Vol.
16%
23°C
$428 Vol.
16%
24°C
$228 Vol.
16%
25°C
$96 Vol.
11%
26°C
$708 Vol.
9%
27°C
$818 Vol.
8%
28°C
$327 Vol.
6%
29°C
$673 Vol.
1%
30°C
$96 Vol.
<1%
31°C or higher
$96 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 20 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.**Trader sentiment for Sao Paulo’s September 20 maximum temperature centers on modest values near or below the historical September average high of roughly 23–25 °C (75 °F), with the highest implied probabilities clustered on 21 °C or below (20.5 %), 23 °C (16.5 %), and 22 °C (15.5 %).**
Multiple forecast sources issued on September 19 project a daytime peak in the 22–25 °C range under mostly cloudy skies and a 30–85 % chance of light rain or showers, consistent with an unusually wet September pattern that has already produced record rainfall exceeding 250 mm in the first half of the month—nearly three times the climatological norm. Persistent cloud cover and moisture limit solar heating and suppress afternoon temperature rises, while light northerly or variable winds provide little additional warming.
Model consensus and recent observations therefore favor a moderate maximum rather than a warm outlier, though small differences in the timing and coverage of showers create the tight spread across the 21–24 °C outcomes visible in market prices.
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 20 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 18, 2026, 8:55 AM ET
Volume
$8,137End Date
Sep 20, 2026Market Opened
Sep 18, 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 20 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.**Trader sentiment for Sao Paulo’s September 20 maximum temperature centers on modest values near or below the historical September average high of roughly 23–25 °C (75 °F), with the highest implied probabilities clustered on 21 °C or below (20.5 %), 23 °C (16.5 %), and 22 °C (15.5 %).**
Multiple forecast sources issued on September 19 project a daytime peak in the 22–25 °C range under mostly cloudy skies and a 30–85 % chance of light rain or showers, consistent with an unusually wet September pattern that has already produced record rainfall exceeding 250 mm in the first half of the month—nearly three times the climatological norm. Persistent cloud cover and moisture limit solar heating and suppress afternoon temperature rises, while light northerly or variable winds provide little additional warming.
Model consensus and recent observations therefore favor a moderate maximum rather than a warm outlier, though small differences in the timing and coverage of showers create the tight spread across the 21–24 °C outcomes visible in market prices.
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 20 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
$8,137End Date
Sep 20, 2026Market Opened
Sep 18, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...**Trader sentiment for Sao Paulo’s September 20 maximum temperature centers on modest values near or below the historical September average high of roughly 23–25 °C (75 °F), with the highest implied probabilities clustered on 21 °C or below (20.5 %), 23 °C (16.5 %), and 22 °C (15.5 %).** Multiple forecast sources issued on September 19 project a daytime peak in the 22–25 °C range under mostly cloudy skies and a 30–85 % chance of light rain or showers, consistent with an unusually wet September pattern that has already produced record rainfall exceeding 250 mm in the first half of the month—nearly three times the climatological norm. Persistent cloud cover and moisture limit solar heating and suppress afternoon temperature rises, while light northerly or variable winds provide little additional warming. Model consensus and recent observations therefore favor a moderate maximum rather than a warm outlier, though small differences in the timing and coverage of showers create the tight spread across the 21–24 °C outcomes visible in market prices.
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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