Recent forecast models show a frontal system bringing widespread cloud cover, showers, and suppressed daytime heating to São Paulo on September 14, with most runs converging on a maximum near 17–18 °C. This cooler anomaly follows a period of above-average warmth earlier in the month and aligns with climatological spring patterns where cold fronts can limit highs well below the 23 °C September mean. Differences between the leading 17 °C and 18 °C outcomes hinge on the precise timing and intensity of precipitation, which reduces solar insolation and caps afternoon warming, alongside minor model spread in boundary-layer moisture and wind. Updated runs from agencies such as INMET or ECMWF over the next 48 hours will likely resolve the narrow gap 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 14?
Highest temperature in Sao Paulo on September 14?
18°C 34%
17°C 31%
16°C 19%
19°C 19%
NEW
NEW
Sep 14, 2026
14°C or below
3%
15°C
10%
16°C
19%
17°C
31%
18°C
34%
19°C
19%
20°C
6%
21°C
6%
22°C
8%
23°C
4%
24°C or higher
4%
18°C 34%
17°C 31%
16°C 19%
19°C 19%
NEW
NEW
Sep 14, 2026
14°C or below
$0 Vol.
3%
15°C
$0 Vol.
10%
16°C
$0 Vol.
19%
17°C
$87 Vol.
31%
18°C
$14 Vol.
34%
19°C
$25 Vol.
19%
20°C
$0 Vol.
6%
21°C
$0 Vol.
6%
22°C
$0 Vol.
8%
23°C
$0 Vol.
4%
24°C or higher
$0 Vol.
4%
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 14 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 forecast models show a frontal system bringing widespread cloud cover, showers, and suppressed daytime heating to São Paulo on September 14, with most runs converging on a maximum near 17–18 °C. This cooler anomaly follows a period of above-average warmth earlier in the month and aligns with climatological spring patterns where cold fronts can limit highs well below the 23 °C September mean. Differences between the leading 17 °C and 18 °C outcomes hinge on the precise timing and intensity of precipitation, which reduces solar insolation and caps afternoon warming, alongside minor model spread in boundary-layer moisture and wind. Updated runs from agencies such as INMET or ECMWF over the next 48 hours will likely resolve the narrow gap 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 14 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 12, 2026, 8:55 AM ET
Volume
$126End Date
Sep 14, 2026Market Opened
Sep 12, 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 14 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 forecast models show a frontal system bringing widespread cloud cover, showers, and suppressed daytime heating to São Paulo on September 14, with most runs converging on a maximum near 17–18 °C. This cooler anomaly follows a period of above-average warmth earlier in the month and aligns with climatological spring patterns where cold fronts can limit highs well below the 23 °C September mean. Differences between the leading 17 °C and 18 °C outcomes hinge on the precise timing and intensity of precipitation, which reduces solar insolation and caps afternoon warming, alongside minor model spread in boundary-layer moisture and wind. Updated runs from agencies such as INMET or ECMWF over the next 48 hours will likely resolve the narrow gap 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 14 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
$126End Date
Sep 14, 2026Market Opened
Sep 12, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...Recent forecast models show a frontal system bringing widespread cloud cover, showers, and suppressed daytime heating to São Paulo on September 14, with most runs converging on a maximum near 17–18 °C. This cooler anomaly follows a period of above-average warmth earlier in the month and aligns with climatological spring patterns where cold fronts can limit highs well below the 23 °C September mean. Differences between the leading 17 °C and 18 °C outcomes hinge on the precise timing and intensity of precipitation, which reduces solar insolation and caps afternoon warming, alongside minor model spread in boundary-layer moisture and wind. Updated runs from agencies such as INMET or ECMWF over the next 48 hours will likely resolve the narrow gap 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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