Recent meteorological observations and forecast models for São Paulo on September 13, 2026, point to a daytime high near 17°C, driven by persistent cloud cover, light rain, and southerly winds advecting cooler maritime air. This aligns with the market-implied odds favoring 17°C at 52.5%, followed by 16°C and 18°C. September 2026 has averaged roughly 7.5°C below the seasonal norm of 23°C, reflecting broader atmospheric patterns that have suppressed typical spring warming. Official guidance from sources like the Met Office and local models shows limited diurnal range today, with temperatures peaking midday before falling overnight, reducing upside risk for higher readings. Updated model runs and any late-day observations will refine resolution criteria for the exact daily maximum.
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 57%
16°C 22%
18°C 19%
19°C 6%
NEW
$38,105 Vol.
NEW
$38,105 Vol.
Sep 13, 2026
12°C or below
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
22%
17°C
57%
18°C
19%
19°C
6%
20°C
2%
21°C
<1%
22°C or higher
<1%
17°C 57%
16°C 22%
18°C 19%
19°C 6%
NEW
$38,105 Vol.
NEW
$38,105 Vol.
Sep 13, 2026
12°C or below
$4,787 Vol.
<1%
13°C
$4,376 Vol.
<1%
14°C
$1,592 Vol.
<1%
15°C
$21,673 Vol.
<1%
16°C
$951 Vol.
22%
17°C
$877 Vol.
57%
18°C
$688 Vol.
19%
19°C
$780 Vol.
6%
20°C
$932 Vol.
2%
21°C
$393 Vol.
<1%
22°C or higher
$1,055 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 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.Recent meteorological observations and forecast models for São Paulo on September 13, 2026, point to a daytime high near 17°C, driven by persistent cloud cover, light rain, and southerly winds advecting cooler maritime air. This aligns with the market-implied odds favoring 17°C at 52.5%, followed by 16°C and 18°C. September 2026 has averaged roughly 7.5°C below the seasonal norm of 23°C, reflecting broader atmospheric patterns that have suppressed typical spring warming. Official guidance from sources like the Met Office and local models shows limited diurnal range today, with temperatures peaking midday before falling overnight, reducing upside risk for higher readings. Updated model runs and any late-day observations will refine resolution criteria for the exact daily maximum.
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
$38,105End 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.Recent meteorological observations and forecast models for São Paulo on September 13, 2026, point to a daytime high near 17°C, driven by persistent cloud cover, light rain, and southerly winds advecting cooler maritime air. This aligns with the market-implied odds favoring 17°C at 52.5%, followed by 16°C and 18°C. September 2026 has averaged roughly 7.5°C below the seasonal norm of 23°C, reflecting broader atmospheric patterns that have suppressed typical spring warming. Official guidance from sources like the Met Office and local models shows limited diurnal range today, with temperatures peaking midday before falling overnight, reducing upside risk for higher readings. Updated model runs and any late-day observations will refine resolution criteria for the exact daily maximum.
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
$38,105End Date
Sep 13, 2026Market Opened
Sep 11, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...Recent meteorological observations and forecast models for São Paulo on September 13, 2026, point to a daytime high near 17°C, driven by persistent cloud cover, light rain, and southerly winds advecting cooler maritime air. This aligns with the market-implied odds favoring 17°C at 52.5%, followed by 16°C and 18°C. September 2026 has averaged roughly 7.5°C below the seasonal norm of 23°C, reflecting broader atmospheric patterns that have suppressed typical spring warming. Official guidance from sources like the Met Office and local models shows limited diurnal range today, with temperatures peaking midday before falling overnight, reducing upside risk for higher readings. Updated model runs and any late-day observations will refine resolution criteria for the exact daily maximum.
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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