Current National Weather Service and ensemble forecasts indicate Atlanta's September 22 overnight low will likely settle in the upper 60s to low 70s °F, driven by persistent southerly flow, high humidity, and scattered thunderstorm activity that limits nocturnal radiative cooling. Late-September climatology supports this range, with average lows near 64 °F but recent model runs showing warmer boundary-layer temperatures and minimal cold-air advection. Trader sentiment remains split near 50 % because small shifts in cloud cover, timing of any showers, or slight steering-pattern changes could push the minimum just below 63 °F or keep it above 82 °F at the daily peak; upcoming afternoon model updates and NHC guidance will refine these variables before 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 Atlanta on September 22?
68-69°F 40%
70-71°F 40%
72-73°F 40%
74-75°F 19%
63°F or below
7%
64-65°F
11%
66-67°F
18%
68-69°F
40%
70-71°F
25%
72-73°F
40%
74-75°F
19%
76-77°F
11%
78-79°F
7%
80-81°F
5%
82°F or higher
5%
68-69°F 40%
70-71°F 40%
72-73°F 40%
74-75°F 19%
63°F or below
7%
64-65°F
11%
66-67°F
18%
68-69°F
40%
70-71°F
25%
72-73°F
40%
74-75°F
19%
76-77°F
11%
78-79°F
7%
80-81°F
5%
82°F or higher
5%
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=katl
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
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 US Units w/ kts" button until the relevant table displays °F.
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 Fahrenheit (eg, 21°F). 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, 3:29 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=katlResolver
0x69c47De9D...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=katl
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
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 US Units w/ kts" button until the relevant table displays °F.
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 Fahrenheit (eg, 21°F). 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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=katlResolver
0x69c47De9D...Current National Weather Service and ensemble forecasts indicate Atlanta's September 22 overnight low will likely settle in the upper 60s to low 70s °F, driven by persistent southerly flow, high humidity, and scattered thunderstorm activity that limits nocturnal radiative cooling. Late-September climatology supports this range, with average lows near 64 °F but recent model runs showing warmer boundary-layer temperatures and minimal cold-air advection. Trader sentiment remains split near 50 % because small shifts in cloud cover, timing of any showers, or slight steering-pattern changes could push the minimum just below 63 °F or keep it above 82 °F at the daily peak; upcoming afternoon model updates and NHC guidance will refine these variables before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions