Recent cooler-than-average conditions across São Paulo, with September temperatures running about 7–8°C below the historical monthly high near 28°C, underpin trader focus on 17–19°C maxima for September 17. Persistent cloud cover, easterly winds, and scattered light precipitation expected from high-pressure patterns and frontal influences are limiting daytime heating, consistent with official model runs showing highs clustered around 15–19°C. These factors create tight differentiation among leading outcomes, as small shifts in cloud timing or wind speed could alter peak readings by 1–2°C. Updated forecasts from agencies like INMET and international ensembles will clarify resolution thresholds before the 17th.
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 17?
Highest temperature in Sao Paulo on September 17?
18°C 34%
19°C 27%
20°C 24%
17°C 18%
NEW
NEW
Sep 17, 2026
11°C or below
<1%
12°C
2%
13°C
3%
14°C
4%
15°C
3%
16°C
12%
17°C
18%
18°C
34%
19°C
27%
20°C
24%
21°C or higher
8%
18°C 34%
19°C 27%
20°C 24%
17°C 18%
NEW
NEW
Sep 17, 2026
11°C or below
$53 Vol.
<1%
12°C
$0 Vol.
2%
13°C
$0 Vol.
3%
14°C
$0 Vol.
4%
15°C
$20 Vol.
3%
16°C
$0 Vol.
12%
17°C
$0 Vol.
18%
18°C
$0 Vol.
34%
19°C
$0 Vol.
27%
20°C
$0 Vol.
24%
21°C or higher
$13 Vol.
8%
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 17 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 cooler-than-average conditions across São Paulo, with September temperatures running about 7–8°C below the historical monthly high near 28°C, underpin trader focus on 17–19°C maxima for September 17. Persistent cloud cover, easterly winds, and scattered light precipitation expected from high-pressure patterns and frontal influences are limiting daytime heating, consistent with official model runs showing highs clustered around 15–19°C. These factors create tight differentiation among leading outcomes, as small shifts in cloud timing or wind speed could alter peak readings by 1–2°C. Updated forecasts from agencies like INMET and international ensembles will clarify resolution thresholds before the 17th.
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 17 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 15, 2026, 8:55 AM ET
Volume
$86End Date
Sep 17, 2026Market Opened
Sep 15, 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 17 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 cooler-than-average conditions across São Paulo, with September temperatures running about 7–8°C below the historical monthly high near 28°C, underpin trader focus on 17–19°C maxima for September 17. Persistent cloud cover, easterly winds, and scattered light precipitation expected from high-pressure patterns and frontal influences are limiting daytime heating, consistent with official model runs showing highs clustered around 15–19°C. These factors create tight differentiation among leading outcomes, as small shifts in cloud timing or wind speed could alter peak readings by 1–2°C. Updated forecasts from agencies like INMET and international ensembles will clarify resolution thresholds before the 17th.
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 17 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
$86End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...Recent cooler-than-average conditions across São Paulo, with September temperatures running about 7–8°C below the historical monthly high near 28°C, underpin trader focus on 17–19°C maxima for September 17. Persistent cloud cover, easterly winds, and scattered light precipitation expected from high-pressure patterns and frontal influences are limiting daytime heating, consistent with official model runs showing highs clustered around 15–19°C. These factors create tight differentiation among leading outcomes, as small shifts in cloud timing or wind speed could alter peak readings by 1–2°C. Updated forecasts from agencies like INMET and international ensembles will clarify resolution thresholds before the 17th.
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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