Official National Weather Service and NOAA forecasts for Chicago on August 28, 2026, converge on a daily high in the low 80s, aligning with the market's 96% implied probability for 82-83°F. This reflects typical late-summer conditions under mostly sunny skies, light southerly winds, and stable atmospheric pressure, consistent with the 1991-2020 climatological average high near 81°F. Multiple model runs show minimal divergence, with limited moisture and no significant warm advection expected to push readings higher. Final official observations from O'Hare or Midway could still shift the exact maximum within the narrow range, though sustained cloud cover or earlier cooling would be required to challenge the current consensus.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Chicago on August 28?
Highest temperature in Chicago on August 28?
82-83°F 98%
84-85°F 4%
86-87°F <1%
88-89°F <1%
$19,712 Vol.
$19,712 Vol.
Aug 28, 2026
75°F or below
<1%
76-77°F
<1%
78-79°F
<1%
80-81°F
<1%
82-83°F
98%
84-85°F
4%
86-87°F
1%
88-89°F
<1%
90-91°F
<1%
92-93°F
<1%
94°F or higher
<1%
82-83°F 98%
84-85°F 4%
86-87°F <1%
88-89°F <1%
$19,712 Vol.
$19,712 Vol.
Aug 28, 2026
75°F or below
$578 Vol.
<1%
76-77°F
$1,836 Vol.
<1%
78-79°F
$2,567 Vol.
<1%
80-81°F
$4,443 Vol.
<1%
82-83°F
$3,863 Vol.
98%
84-85°F
$3,465 Vol.
4%
86-87°F
$1,642 Vol.
1%
88-89°F
$546 Vol.
<1%
90-91°F
$235 Vol.
<1%
92-93°F
$269 Vol.
<1%
94°F or higher
$269 Vol.
<1%
This market will resolve to the temperature range that contains the highest 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 highest 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 National Weather Service and NOAA forecasts for Chicago on August 28, 2026, converge on a daily high in the low 80s, aligning with the market's 96% implied probability for 82-83°F. This reflects typical late-summer conditions under mostly sunny skies, light southerly winds, and stable atmospheric pressure, consistent with the 1991-2020 climatological average high near 81°F. Multiple model runs show minimal divergence, with limited moisture and no significant warm advection expected to push readings higher. Final official observations from O'Hare or Midway could still shift the exact maximum within the narrow range, though sustained cloud cover or earlier cooling would be required to challenge the current consensus.
This market will resolve to the temperature range that contains the highest 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 highest 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 highest 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, 8:56 PM ET
Volume
$19,712End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest 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 highest 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 National Weather Service and NOAA forecasts for Chicago on August 28, 2026, converge on a daily high in the low 80s, aligning with the market's 96% implied probability for 82-83°F. This reflects typical late-summer conditions under mostly sunny skies, light southerly winds, and stable atmospheric pressure, consistent with the 1991-2020 climatological average high near 81°F. Multiple model runs show minimal divergence, with limited moisture and no significant warm advection expected to push readings higher. Final official observations from O'Hare or Midway could still shift the exact maximum within the narrow range, though sustained cloud cover or earlier cooling would be required to challenge the current consensus.
This market will resolve to the temperature range that contains the highest 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 highest 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 highest 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
$19,712End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Official National Weather Service and NOAA forecasts for Chicago on August 28, 2026, converge on a daily high in the low 80s, aligning with the market's 96% implied probability for 82-83°F. This reflects typical late-summer conditions under mostly sunny skies, light southerly winds, and stable atmospheric pressure, consistent with the 1991-2020 climatological average high near 81°F. Multiple model runs show minimal divergence, with limited moisture and no significant warm advection expected to push readings higher. Final official observations from O'Hare or Midway could still shift the exact maximum within the narrow range, though sustained cloud cover or earlier cooling would be required to challenge the current consensus.
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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