Official forecasts from the National Weather Service and other meteorological sources indicate Chicago's overnight low on August 28 will likely settle in the mid-60s°F, aligning with the closely matched market probabilities clustered between 58–71°F. Light southerly winds, partly cloudy skies, and moderate dew points near 60°F support radiative cooling after daytime highs in the upper 70s to low 80s, though variable cloud cover and lake moderation introduce uncertainty in the precise minimum. These conditions track near the 1991–2020 climatological average low of 64.8°F, with traders weighting slight model differences in boundary-layer mixing and local urban heat effects that could shift the reading across adjacent temperature bins. Updated guidance ahead of the overnight period will refine the range.
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?
66-67°F 49%
70-71°F 49%
58-59°F 25%
68-69°F 25%
NEW
NEW
Aug 28, 2026
55°F or below
8%
56-57°F
<1%
58-59°F
25%
60-61°F
7%
62-63°F
13%
64-65°F
27%
66-67°F
27%
68-69°F
25%
70-71°F
49%
72-73°F
13%
74°F or higher
<1%
66-67°F 49%
70-71°F 49%
58-59°F 25%
68-69°F 25%
NEW
NEW
Aug 28, 2026
55°F or below
$11 Vol.
8%
56-57°F
$21 Vol.
<1%
58-59°F
$0 Vol.
25%
60-61°F
$0 Vol.
7%
62-63°F
$0 Vol.
13%
64-65°F
$6 Vol.
27%
66-67°F
$39 Vol.
27%
68-69°F
$0 Vol.
25%
70-71°F
$5 Vol.
49%
72-73°F
$5 Vol.
13%
74°F or higher
$5 Vol.
<1%
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.Official forecasts from the National Weather Service and other meteorological sources indicate Chicago's overnight low on August 28 will likely settle in the mid-60s°F, aligning with the closely matched market probabilities clustered between 58–71°F. Light southerly winds, partly cloudy skies, and moderate dew points near 60°F support radiative cooling after daytime highs in the upper 70s to low 80s, though variable cloud cover and lake moderation introduce uncertainty in the precise minimum. These conditions track near the 1991–2020 climatological average low of 64.8°F, with traders weighting slight model differences in boundary-layer mixing and local urban heat effects that could shift the reading across adjacent temperature bins. Updated guidance ahead of the overnight period will refine the range.
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
$92End 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.Official forecasts from the National Weather Service and other meteorological sources indicate Chicago's overnight low on August 28 will likely settle in the mid-60s°F, aligning with the closely matched market probabilities clustered between 58–71°F. Light southerly winds, partly cloudy skies, and moderate dew points near 60°F support radiative cooling after daytime highs in the upper 70s to low 80s, though variable cloud cover and lake moderation introduce uncertainty in the precise minimum. These conditions track near the 1991–2020 climatological average low of 64.8°F, with traders weighting slight model differences in boundary-layer mixing and local urban heat effects that could shift the reading across adjacent temperature bins. Updated guidance ahead of the overnight period will refine the range.
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
$92End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 9:29 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Official forecasts from the National Weather Service and other meteorological sources indicate Chicago's overnight low on August 28 will likely settle in the mid-60s°F, aligning with the closely matched market probabilities clustered between 58–71°F. Light southerly winds, partly cloudy skies, and moderate dew points near 60°F support radiative cooling after daytime highs in the upper 70s to low 80s, though variable cloud cover and lake moderation introduce uncertainty in the precise minimum. These conditions track near the 1991–2020 climatological average low of 64.8°F, with traders weighting slight model differences in boundary-layer mixing and local urban heat effects that could shift the reading across adjacent temperature bins. Updated guidance ahead of the overnight period will refine the range.
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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