Official National Weather Service observations from Chicago stations, including Midway, recorded an overnight minimum of 66°F on August 29, 2026, aligning closely with the 1991–2020 climatological normal low of 64–65°F for late August under typical southerly flow and light rain conditions that limited radiative cooling. This data-driven outcome produced the market's 100% consensus on 64–65°F, as traders incorporated verified station readings rather than models. A realistic challenge would require a revised official report from the primary resolution station showing a lower value due to a localized cold pocket or instrumentation adjustment, though such revisions are rare after initial quality control.
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 29?
Lowest temperature in Chicago on August 29?
64-65°F 100.0%
55°F or below 1.0%
58-59°F 1.0%
60-61°F 1.0%
$1,686 Vol.
$1,686 Vol.
Aug 29, 2026
55°F or below
No
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
No
64-65°F
Yes
66-67°F
No
68-69°F
No
70-71°F
No
72-73°F
No
74°F or higher
No
64-65°F 100.0%
55°F or below 1.0%
58-59°F 1.0%
60-61°F 1.0%
$1,686 Vol.
$1,686 Vol.
Aug 29, 2026
55°F or below
$147 Vol.
No
56-57°F
$84 Vol.
No
58-59°F
$100 Vol.
No
60-61°F
$67 Vol.
No
62-63°F
$52 Vol.
No
64-65°F
$279 Vol.
Yes
66-67°F
$100 Vol.
No
68-69°F
$455 Vol.
No
70-71°F
$222 Vol.
No
72-73°F
$63 Vol.
No
74°F or higher
$116 Vol.
No
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 29 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 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.
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.Official National Weather Service observations from Chicago stations, including Midway, recorded an overnight minimum of 66°F on August 29, 2026, aligning closely with the 1991–2020 climatological normal low of 64–65°F for late August under typical southerly flow and light rain conditions that limited radiative cooling. This data-driven outcome produced the market's 100% consensus on 64–65°F, as traders incorporated verified station readings rather than models. A realistic challenge would require a revised official report from the primary resolution station showing a lower value due to a localized cold pocket or instrumentation adjustment, though such revisions are rare after initial quality control.
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 29 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 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.
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 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.
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 27, 2026, 9:29 PM ET
Volume
$1,686End Date
Aug 29, 2026Market Opened
Aug 27, 2026, 9:29 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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 29 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 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.
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.Official National Weather Service observations from Chicago stations, including Midway, recorded an overnight minimum of 66°F on August 29, 2026, aligning closely with the 1991–2020 climatological normal low of 64–65°F for late August under typical southerly flow and light rain conditions that limited radiative cooling. This data-driven outcome produced the market's 100% consensus on 64–65°F, as traders incorporated verified station readings rather than models. A realistic challenge would require a revised official report from the primary resolution station showing a lower value due to a localized cold pocket or instrumentation adjustment, though such revisions are rare after initial quality control.
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 29 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 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.
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 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.
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
$1,686End Date
Aug 29, 2026Market Opened
Aug 27, 2026, 9:29 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official National Weather Service observations from Chicago stations, including Midway, recorded an overnight minimum of 66°F on August 29, 2026, aligning closely with the 1991–2020 climatological normal low of 64–65°F for late August under typical southerly flow and light rain conditions that limited radiative cooling. This data-driven outcome produced the market's 100% consensus on 64–65°F, as traders incorporated verified station readings rather than models. A realistic challenge would require a revised official report from the primary resolution station showing a lower value due to a localized cold pocket or instrumentation adjustment, though such revisions are rare after initial quality control.
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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