Official National Weather Service and NOAA forecasts for Chicago on August 28, 2026, converge on a daytime high in the low 80s under mostly sunny morning conditions turning partly cloudy, with light southerly winds. This aligns with the market's heavy weighting toward 82–83°F (58.5%) and nearby bins, reflecting the climatological average high near 81°F plus modest warming from clear skies and typical late-August insolation. Recent model runs show minimal spread, with no incoming cold front or excessive cloud cover to suppress readings, while lake-breeze effects may cap the upper end below 85°F. Trader consensus thus centers on this narrow range absent any last-minute forecast shifts.
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 65%
84-85°F 20%
80-81°F 12%
76-77°F 2%
NEW
NEW
Aug 28, 2026
75°F or below
<1%
76-77°F
2%
78-79°F
2%
80-81°F
12%
82-83°F
65%
84-85°F
20%
86-87°F
2%
88-89°F
<1%
90-91°F
<1%
92-93°F
<1%
94°F or higher
<1%
82-83°F 65%
84-85°F 20%
80-81°F 12%
76-77°F 2%
NEW
NEW
Aug 28, 2026
75°F or below
$578 Vol.
<1%
76-77°F
$600 Vol.
2%
78-79°F
$373 Vol.
2%
80-81°F
$1,107 Vol.
12%
82-83°F
$2,125 Vol.
65%
84-85°F
$1,442 Vol.
20%
86-87°F
$518 Vol.
2%
88-89°F
$102 Vol.
<1%
90-91°F
$206 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 daytime high in the low 80s under mostly sunny morning conditions turning partly cloudy, with light southerly winds. This aligns with the market's heavy weighting toward 82–83°F (58.5%) and nearby bins, reflecting the climatological average high near 81°F plus modest warming from clear skies and typical late-August insolation. Recent model runs show minimal spread, with no incoming cold front or excessive cloud cover to suppress readings, while lake-breeze effects may cap the upper end below 85°F. Trader consensus thus centers on this narrow range absent any last-minute forecast shifts.
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
$7,587End 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 daytime high in the low 80s under mostly sunny morning conditions turning partly cloudy, with light southerly winds. This aligns with the market's heavy weighting toward 82–83°F (58.5%) and nearby bins, reflecting the climatological average high near 81°F plus modest warming from clear skies and typical late-August insolation. Recent model runs show minimal spread, with no incoming cold front or excessive cloud cover to suppress readings, while lake-breeze effects may cap the upper end below 85°F. Trader consensus thus centers on this narrow range absent any last-minute forecast shifts.
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
$7,587End 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 daytime high in the low 80s under mostly sunny morning conditions turning partly cloudy, with light southerly winds. This aligns with the market's heavy weighting toward 82–83°F (58.5%) and nearby bins, reflecting the climatological average high near 81°F plus modest warming from clear skies and typical late-August insolation. Recent model runs show minimal spread, with no incoming cold front or excessive cloud cover to suppress readings, while lake-breeze effects may cap the upper end below 85°F. Trader consensus thus centers on this narrow range absent any last-minute forecast shifts.
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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