**Divergent model runs on an incoming cold front create the near-even split between sub-15°C and 24°C+ minimums for September 22 in São Paulo.** Official guidance from agencies shows overnight lows potentially dropping to 13–17°C amid widespread rain and increased cloud cover, which limits nighttime radiative cooling, while some ensembles keep readings closer to 18–20°C under lingering warmer advection. Historical September averages place typical minima near 16°C, so the current spread reflects uncertainty in front timing, wind shifts, and precipitation intensity—key variables that will be clarified by updated NHC/INMET-style short-range guidance and local observations over the next 24 hours. Traders appear to weigh the risk of stronger cooling against the chance of a milder, more stable night.
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 22?
Lowest temperature in Sao Paulo on September 22?
14°C or below 89%
24°C or higher 80%
16°C 40%
15°C 39%
NEW
NEW
Sep 22, 2026
14°C or below
89%
15°C
39%
16°C
40%
17°C
28%
18°C
39%
19°C
21%
20°C
9%
21°C
39%
22°C
39%
23°C
39%
24°C or higher
80%
14°C or below 89%
24°C or higher 80%
16°C 40%
15°C 39%
NEW
NEW
Sep 22, 2026
14°C or below
$0 Vol.
89%
15°C
$0 Vol.
39%
16°C
$0 Vol.
40%
17°C
$3 Vol.
28%
18°C
$0 Vol.
39%
19°C
$0 Vol.
21%
20°C
$15 Vol.
9%
21°C
$0 Vol.
39%
22°C
$0 Vol.
39%
23°C
$0 Vol.
39%
24°C or higher
$0 Vol.
80%
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 22 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.**Divergent model runs on an incoming cold front create the near-even split between sub-15°C and 24°C+ minimums for September 22 in São Paulo.** Official guidance from agencies shows overnight lows potentially dropping to 13–17°C amid widespread rain and increased cloud cover, which limits nighttime radiative cooling, while some ensembles keep readings closer to 18–20°C under lingering warmer advection. Historical September averages place typical minima near 16°C, so the current spread reflects uncertainty in front timing, wind shifts, and precipitation intensity—key variables that will be clarified by updated NHC/INMET-style short-range guidance and local observations over the next 24 hours. Traders appear to weigh the risk of stronger cooling against the chance of a milder, more stable night.
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 22 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 20, 2026, 8:29 AM ET
Volume
$18End Date
Sep 22, 2026Market Opened
Sep 20, 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 22 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.**Divergent model runs on an incoming cold front create the near-even split between sub-15°C and 24°C+ minimums for September 22 in São Paulo.** Official guidance from agencies shows overnight lows potentially dropping to 13–17°C amid widespread rain and increased cloud cover, which limits nighttime radiative cooling, while some ensembles keep readings closer to 18–20°C under lingering warmer advection. Historical September averages place typical minima near 16°C, so the current spread reflects uncertainty in front timing, wind shifts, and precipitation intensity—key variables that will be clarified by updated NHC/INMET-style short-range guidance and local observations over the next 24 hours. Traders appear to weigh the risk of stronger cooling against the chance of a milder, more stable night.
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 22 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
$18End Date
Sep 22, 2026Market Opened
Sep 20, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=sbgrResolver
0x69c47De9D...**Divergent model runs on an incoming cold front create the near-even split between sub-15°C and 24°C+ minimums for September 22 in São Paulo.** Official guidance from agencies shows overnight lows potentially dropping to 13–17°C amid widespread rain and increased cloud cover, which limits nighttime radiative cooling, while some ensembles keep readings closer to 18–20°C under lingering warmer advection. Historical September averages place typical minima near 16°C, so the current spread reflects uncertainty in front timing, wind shifts, and precipitation intensity—key variables that will be clarified by updated NHC/INMET-style short-range guidance and local observations over the next 24 hours. Traders appear to weigh the risk of stronger cooling against the chance of a milder, more stable night.
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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