Official National Weather Service observations at Chicago O'Hare recorded a maximum of 83°F on August 28, 2026, at 2:32 PM local time—slightly above the 1991–2020 climatological normal of 81°F and well below the date's historical record of 97°F. This verified reading from the primary reporting station drove the market's near-certain consensus on the 82–83°F bin, reflecting traders' reliance on authoritative NOAA data over models or forecasts. A late revision, station-specific discrepancy, or rare measurement error could theoretically shift resolution, though such adjustments are uncommon once preliminary climatological reports are issued.
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 100.0%
75°F or below <1%
76-77°F <1%
78-79°F <1%
$22,258 Vol.
$22,258 Vol.
Aug 28, 2026
75°F or below
No
76-77°F
No
78-79°F
No
80-81°F
No
82-83°F
Yes
84-85°F
No
86-87°F
No
88-89°F
No
90-91°F
No
92-93°F
No
94°F or higher
No
82-83°F 100.0%
75°F or below <1%
76-77°F <1%
78-79°F <1%
$22,258 Vol.
$22,258 Vol.
Aug 28, 2026
75°F or below
$578 Vol.
No
76-77°F
$2,036 Vol.
No
78-79°F
$2,567 Vol.
No
80-81°F
$4,458 Vol.
No
82-83°F
$5,291 Vol.
Yes
84-85°F
$4,339 Vol.
No
86-87°F
$1,670 Vol.
No
88-89°F
$546 Vol.
No
90-91°F
$235 Vol.
No
92-93°F
$269 Vol.
No
94°F or higher
$269 Vol.
No
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 observations at Chicago O'Hare recorded a maximum of 83°F on August 28, 2026, at 2:32 PM local time—slightly above the 1991–2020 climatological normal of 81°F and well below the date's historical record of 97°F. This verified reading from the primary reporting station drove the market's near-certain consensus on the 82–83°F bin, reflecting traders' reliance on authoritative NOAA data over models or forecasts. A late revision, station-specific discrepancy, or rare measurement error could theoretically shift resolution, though such adjustments are uncommon once preliminary climatological reports are issued.
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
$22,258End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
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 observations at Chicago O'Hare recorded a maximum of 83°F on August 28, 2026, at 2:32 PM local time—slightly above the 1991–2020 climatological normal of 81°F and well below the date's historical record of 97°F. This verified reading from the primary reporting station drove the market's near-certain consensus on the 82–83°F bin, reflecting traders' reliance on authoritative NOAA data over models or forecasts. A late revision, station-specific discrepancy, or rare measurement error could theoretically shift resolution, though such adjustments are uncommon once preliminary climatological reports are issued.
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
$22,258End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
Official National Weather Service observations at Chicago O'Hare recorded a maximum of 83°F on August 28, 2026, at 2:32 PM local time—slightly above the 1991–2020 climatological normal of 81°F and well below the date's historical record of 97°F. This verified reading from the primary reporting station drove the market's near-certain consensus on the 82–83°F bin, reflecting traders' reliance on authoritative NOAA data over models or forecasts. A late revision, station-specific discrepancy, or rare measurement error could theoretically shift resolution, though such adjustments are uncommon once preliminary climatological reports are issued.
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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