A cold front advancing from the south, coupled with an influx of polar maritime air, is the dominant driver suppressing maximum temperatures across São Paulo on September 6. Official guidance and ensemble models indicate daytime highs centered near 14–17 °C under persistent overcast skies, southeasterly winds, and periods of light-to-moderate rain that limit solar heating and enhance evaporative cooling. This setup aligns with the market’s tight clustering around the 15 °C (36 %) and 16 °C (32.5 %) contracts, reflecting modest spread among short-range forecasts. Historical September averages near 23 °C underscore the anomaly, while residual uncertainty stems from exact frontal timing and rainfall intensity, both of which will be clarified by final observational data at the close of the 24-hour period.
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 6?
Highest temperature in Sao Paulo on September 6?
15°C 33%
16°C 33%
17°C 21%
14°C 7%
NEW
$18,019 Vol.
NEW
$18,019 Vol.
Sep 6, 2026
13°C or below
4%
14°C
7%
15°C
33%
16°C
33%
17°C
21%
18°C
3%
19°C
<1%
20°C
<1%
21°C
<1%
22°C
<1%
23°C or higher
<1%
15°C 33%
16°C 33%
17°C 21%
14°C 7%
NEW
$18,019 Vol.
NEW
$18,019 Vol.
Sep 6, 2026
13°C or below
$1,528 Vol.
4%
14°C
$2,340 Vol.
7%
15°C
$4,979 Vol.
33%
16°C
$1,045 Vol.
33%
17°C
$2,547 Vol.
21%
18°C
$1,477 Vol.
3%
19°C
$418 Vol.
<1%
20°C
$282 Vol.
<1%
21°C
$1,045 Vol.
<1%
22°C
$1,223 Vol.
<1%
23°C or higher
$1,135 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 6 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.A cold front advancing from the south, coupled with an influx of polar maritime air, is the dominant driver suppressing maximum temperatures across São Paulo on September 6. Official guidance and ensemble models indicate daytime highs centered near 14–17 °C under persistent overcast skies, southeasterly winds, and periods of light-to-moderate rain that limit solar heating and enhance evaporative cooling. This setup aligns with the market’s tight clustering around the 15 °C (36 %) and 16 °C (32.5 %) contracts, reflecting modest spread among short-range forecasts. Historical September averages near 23 °C underscore the anomaly, while residual uncertainty stems from exact frontal timing and rainfall intensity, both of which will be clarified by final observational data at the close of the 24-hour period.
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 6 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 4, 2026, 8:55 AM ET
Volume
$18,019End Date
Sep 6, 2026Market Opened
Sep 4, 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 6 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.A cold front advancing from the south, coupled with an influx of polar maritime air, is the dominant driver suppressing maximum temperatures across São Paulo on September 6. Official guidance and ensemble models indicate daytime highs centered near 14–17 °C under persistent overcast skies, southeasterly winds, and periods of light-to-moderate rain that limit solar heating and enhance evaporative cooling. This setup aligns with the market’s tight clustering around the 15 °C (36 %) and 16 °C (32.5 %) contracts, reflecting modest spread among short-range forecasts. Historical September averages near 23 °C underscore the anomaly, while residual uncertainty stems from exact frontal timing and rainfall intensity, both of which will be clarified by final observational data at the close of the 24-hour period.
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 6 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
$18,019End Date
Sep 6, 2026Market Opened
Sep 4, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...A cold front advancing from the south, coupled with an influx of polar maritime air, is the dominant driver suppressing maximum temperatures across São Paulo on September 6. Official guidance and ensemble models indicate daytime highs centered near 14–17 °C under persistent overcast skies, southeasterly winds, and periods of light-to-moderate rain that limit solar heating and enhance evaporative cooling. This setup aligns with the market’s tight clustering around the 15 °C (36 %) and 16 °C (32.5 %) contracts, reflecting modest spread among short-range forecasts. Historical September averages near 23 °C underscore the anomaly, while residual uncertainty stems from exact frontal timing and rainfall intensity, both of which will be clarified by final observational data at the close of the 24-hour period.
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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