**Incoming frontal system and persistent rain are suppressing daytime heating in São Paulo, driving market-implied odds toward 16–18°C for the September 13 maximum.** Multiple forecast models, including those from the Met Office and regional sources, project a high near 16–17°C under overcast skies, southeasterly winds, and widespread showers or thunderstorms, well below the typical early-spring average of ~23°C. High humidity, cloud cover, and limited solar insolation limit warming, while any brief clearing or lighter precipitation timing could allow a brief rise toward 18–19°C. Trader consensus reflects this narrow range amid model agreement on the overall cool, wet pattern and minor uncertainty in exact peak values.
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 13?
Highest temperature in Sao Paulo on September 13?
17°C 37%
18°C 30%
16°C 22%
19°C 13%
NEW
NEW
Sep 13, 2026
12°C or below
1%
13°C
3%
14°C
5%
15°C
6%
16°C
22%
17°C
37%
18°C
30%
19°C
13%
20°C
5%
21°C
5%
22°C or higher
2%
17°C 37%
18°C 30%
16°C 22%
19°C 13%
NEW
NEW
Sep 13, 2026
12°C or below
$0 Vol.
1%
13°C
$0 Vol.
3%
14°C
$0 Vol.
5%
15°C
$0 Vol.
6%
16°C
$6 Vol.
22%
17°C
$76 Vol.
37%
18°C
$23 Vol.
30%
19°C
$90 Vol.
13%
20°C
$5 Vol.
5%
21°C
$0 Vol.
5%
22°C or higher
$118 Vol.
2%
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 13 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.**Incoming frontal system and persistent rain are suppressing daytime heating in São Paulo, driving market-implied odds toward 16–18°C for the September 13 maximum.** Multiple forecast models, including those from the Met Office and regional sources, project a high near 16–17°C under overcast skies, southeasterly winds, and widespread showers or thunderstorms, well below the typical early-spring average of ~23°C. High humidity, cloud cover, and limited solar insolation limit warming, while any brief clearing or lighter precipitation timing could allow a brief rise toward 18–19°C. Trader consensus reflects this narrow range amid model agreement on the overall cool, wet pattern and minor uncertainty in exact peak values.
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 13 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 11, 2026, 8:55 AM ET
Volume
$284End Date
Sep 13, 2026Market Opened
Sep 11, 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 13 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.**Incoming frontal system and persistent rain are suppressing daytime heating in São Paulo, driving market-implied odds toward 16–18°C for the September 13 maximum.** Multiple forecast models, including those from the Met Office and regional sources, project a high near 16–17°C under overcast skies, southeasterly winds, and widespread showers or thunderstorms, well below the typical early-spring average of ~23°C. High humidity, cloud cover, and limited solar insolation limit warming, while any brief clearing or lighter precipitation timing could allow a brief rise toward 18–19°C. Trader consensus reflects this narrow range amid model agreement on the overall cool, wet pattern and minor uncertainty in exact peak values.
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 13 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
$284End Date
Sep 13, 2026Market Opened
Sep 11, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...**Incoming frontal system and persistent rain are suppressing daytime heating in São Paulo, driving market-implied odds toward 16–18°C for the September 13 maximum.** Multiple forecast models, including those from the Met Office and regional sources, project a high near 16–17°C under overcast skies, southeasterly winds, and widespread showers or thunderstorms, well below the typical early-spring average of ~23°C. High humidity, cloud cover, and limited solar insolation limit warming, while any brief clearing or lighter precipitation timing could allow a brief rise toward 18–19°C. Trader consensus reflects this narrow range amid model agreement on the overall cool, wet pattern and minor uncertainty in exact peak values.
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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