Recent National Weather Service forecasts for Chicago project overnight lows in the mid-60s°F for the period covering August 28, driven by mostly clear to partly cloudy skies, light variable winds, and moderate radiational cooling under high pressure. These conditions favor minimum readings near 65–67°F at official stations like O’Hare, consistent with climatological averages around 65°F, though lake-effect moderation and any increase in low-level moisture or clouds could nudge readings slightly higher or lower. Model consensus shows limited spread, but small shifts in timing of cloud cover or wind direction remain key variables that could differentiate bins clustered around 62–65°F. Updated guidance and observational trends ahead of the overnight period will refine resolution odds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Chicago on August 28?
Lowest temperature in Chicago on August 28?
62-63°F 37%
64-65°F 32%
60-61°F 27%
56-57°F 24%
NEW
NEW
Aug 28, 2026
55°F or below
22%
56-57°F
24%
58-59°F
23%
60-61°F
27%
62-63°F
37%
64-65°F
32%
66-67°F
24%
68-69°F
23%
70-71°F
19%
72-73°F
11%
74°F or higher
4%
62-63°F 37%
64-65°F 32%
60-61°F 27%
56-57°F 24%
NEW
NEW
Aug 28, 2026
55°F or below
$0 Vol.
22%
56-57°F
$0 Vol.
24%
58-59°F
$0 Vol.
23%
60-61°F
$0 Vol.
27%
62-63°F
$0 Vol.
37%
64-65°F
$0 Vol.
32%
66-67°F
$0 Vol.
24%
68-69°F
$0 Vol.
23%
70-71°F
$5 Vol.
19%
72-73°F
$5 Vol.
11%
74°F or higher
$5 Vol.
4%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 28 Aug '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=kord
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.Recent National Weather Service forecasts for Chicago project overnight lows in the mid-60s°F for the period covering August 28, driven by mostly clear to partly cloudy skies, light variable winds, and moderate radiational cooling under high pressure. These conditions favor minimum readings near 65–67°F at official stations like O’Hare, consistent with climatological averages around 65°F, though lake-effect moderation and any increase in low-level moisture or clouds could nudge readings slightly higher or lower. Model consensus shows limited spread, but small shifts in timing of cloud cover or wind direction remain key variables that could differentiate bins clustered around 62–65°F. Updated guidance and observational trends ahead of the overnight period will refine resolution odds.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 28 Aug '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=kord
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
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=kord
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Aug 26, 2026, 9:29 PM ET
Volume
$15End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 9:29 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 28 Aug '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=kord
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.Recent National Weather Service forecasts for Chicago project overnight lows in the mid-60s°F for the period covering August 28, driven by mostly clear to partly cloudy skies, light variable winds, and moderate radiational cooling under high pressure. These conditions favor minimum readings near 65–67°F at official stations like O’Hare, consistent with climatological averages around 65°F, though lake-effect moderation and any increase in low-level moisture or clouds could nudge readings slightly higher or lower. Model consensus shows limited spread, but small shifts in timing of cloud cover or wind direction remain key variables that could differentiate bins clustered around 62–65°F. Updated guidance and observational trends ahead of the overnight period will refine resolution odds.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 28 Aug '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=kord
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
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=kord
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
Volume
$15End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 9:29 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Recent National Weather Service forecasts for Chicago project overnight lows in the mid-60s°F for the period covering August 28, driven by mostly clear to partly cloudy skies, light variable winds, and moderate radiational cooling under high pressure. These conditions favor minimum readings near 65–67°F at official stations like O’Hare, consistent with climatological averages around 65°F, though lake-effect moderation and any increase in low-level moisture or clouds could nudge readings slightly higher or lower. Model consensus shows limited spread, but small shifts in timing of cloud cover or wind direction remain key variables that could differentiate bins clustered around 62–65°F. Updated guidance and observational trends ahead of the overnight period will refine resolution odds.
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