Recent forecasts for São Paulo on September 21 indicate a daytime high near 28–32°C under mostly clear to partly cloudy skies, with the overnight low expected around 19–20°C as northerly winds moderate radiative cooling. This positions trader sentiment near equilibrium between a warmer minimum (26°C or higher) and a cooler one (16°C or below), reflecting model spread in boundary-layer mixing and cloud timing. Key differentiators include the strength of the subtropical high, dew-point depression influencing minimum temperature, and any late-day frontal moisture that could limit nocturnal cooling. Historical September lows average near 12°C, so current guidance represents above-normal warmth driven by persistent warm advection. Updated model runs and official observations from INMET will refine probabilities ahead of market resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Sao Paulo on September 21?
Lowest temperature in Sao Paulo on September 21?
16°C or below 88%
26°C or higher 76%
18°C 39%
19°C 31%
NEW
NEW
Sep 21, 2026
16°C or below
88%
17°C
23%
18°C
39%
19°C
31%
20°C
22%
21°C
12%
22°C
16%
23°C
14%
24°C
14%
25°C
14%
26°C or higher
76%
16°C or below 88%
26°C or higher 76%
18°C 39%
19°C 31%
NEW
NEW
Sep 21, 2026
16°C or below
$0 Vol.
88%
17°C
$0 Vol.
23%
18°C
$0 Vol.
39%
19°C
$0 Vol.
31%
20°C
$0 Vol.
22%
21°C
$0 Vol.
12%
22°C
$0 Vol.
16%
23°C
$0 Vol.
14%
24°C
$0 Vol.
14%
25°C
$0 Vol.
14%
26°C or higher
$0 Vol.
76%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 forecasts for São Paulo on September 21 indicate a daytime high near 28–32°C under mostly clear to partly cloudy skies, with the overnight low expected around 19–20°C as northerly winds moderate radiative cooling. This positions trader sentiment near equilibrium between a warmer minimum (26°C or higher) and a cooler one (16°C or below), reflecting model spread in boundary-layer mixing and cloud timing. Key differentiators include the strength of the subtropical high, dew-point depression influencing minimum temperature, and any late-day frontal moisture that could limit nocturnal cooling. Historical September lows average near 12°C, so current guidance represents above-normal warmth driven by persistent warm advection. Updated model runs and official observations from INMET will refine probabilities ahead of market resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 lowest 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 19, 2026, 8:29 AM ET
Volume
$0End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 forecasts for São Paulo on September 21 indicate a daytime high near 28–32°C under mostly clear to partly cloudy skies, with the overnight low expected around 19–20°C as northerly winds moderate radiative cooling. This positions trader sentiment near equilibrium between a warmer minimum (26°C or higher) and a cooler one (16°C or below), reflecting model spread in boundary-layer mixing and cloud timing. Key differentiators include the strength of the subtropical high, dew-point depression influencing minimum temperature, and any late-day frontal moisture that could limit nocturnal cooling. Historical September lows average near 12°C, so current guidance represents above-normal warmth driven by persistent warm advection. Updated model runs and official observations from INMET will refine probabilities ahead of market resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 lowest 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
$0End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...Recent forecasts for São Paulo on September 21 indicate a daytime high near 28–32°C under mostly clear to partly cloudy skies, with the overnight low expected around 19–20°C as northerly winds moderate radiative cooling. This positions trader sentiment near equilibrium between a warmer minimum (26°C or higher) and a cooler one (16°C or below), reflecting model spread in boundary-layer mixing and cloud timing. Key differentiators include the strength of the subtropical high, dew-point depression influencing minimum temperature, and any late-day frontal moisture that could limit nocturnal cooling. Historical September lows average near 12°C, so current guidance represents above-normal warmth driven by persistent warm advection. Updated model runs and official observations from INMET will refine probabilities ahead of market 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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