Forecast models from the National Weather Service and private outlets currently project a daily maximum near 86°F for Chicago on September 8, driven by southerly flow, partly sunny skies, and surface temperatures building from mid-70s overnight lows. This places the outcome near the upper end of the closely bunched 84–87°F range holding the highest implied probabilities. Key differentiating factors include the exact timing of any afternoon cloud increase or weak frontal passage, which could cap readings in the low-to-mid 80s, versus stronger insolation that would push toward 87–88°F. The setup follows several days of above-normal warmth early in the month, though September climatology favors highs near 79°F and leaves room for model adjustments before resolution.
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 September 8?
Highest temperature in Chicago on September 8?
86-87°F 36%
82-83°F 35%
84-85°F 27%
80-81°F 21%
NEW
NEW
Sep 8, 2026
77°F or below
3%
78-79°F
3%
80-81°F
21%
82-83°F
35%
84-85°F
27%
86-87°F
36%
88-89°F
10%
90-91°F
7%
92-93°F
7%
94-95°F
3%
96°F or higher
3%
86-87°F 36%
82-83°F 35%
84-85°F 27%
80-81°F 21%
NEW
NEW
Sep 8, 2026
77°F or below
$0 Vol.
3%
78-79°F
$0 Vol.
3%
80-81°F
$0 Vol.
21%
82-83°F
$0 Vol.
35%
84-85°F
$35 Vol.
27%
86-87°F
$0 Vol.
36%
88-89°F
$11 Vol.
10%
90-91°F
$0 Vol.
7%
92-93°F
$0 Vol.
7%
94-95°F
$0 Vol.
3%
96°F or higher
$0 Vol.
3%
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 8 Sep '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 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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.Forecast models from the National Weather Service and private outlets currently project a daily maximum near 86°F for Chicago on September 8, driven by southerly flow, partly sunny skies, and surface temperatures building from mid-70s overnight lows. This places the outcome near the upper end of the closely bunched 84–87°F range holding the highest implied probabilities. Key differentiating factors include the exact timing of any afternoon cloud increase or weak frontal passage, which could cap readings in the low-to-mid 80s, versus stronger insolation that would push toward 87–88°F. The setup follows several days of above-normal warmth early in the month, though September climatology favors highs near 79°F and leaves room for model adjustments before resolution.
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 8 Sep '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 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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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: Sep 6, 2026, 2:56 AM ET
Volume
$46End Date
Sep 8, 2026Market Opened
Sep 6, 2026, 2:56 AM 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 8 Sep '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 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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.Forecast models from the National Weather Service and private outlets currently project a daily maximum near 86°F for Chicago on September 8, driven by southerly flow, partly sunny skies, and surface temperatures building from mid-70s overnight lows. This places the outcome near the upper end of the closely bunched 84–87°F range holding the highest implied probabilities. Key differentiating factors include the exact timing of any afternoon cloud increase or weak frontal passage, which could cap readings in the low-to-mid 80s, versus stronger insolation that would push toward 87–88°F. The setup follows several days of above-normal warmth early in the month, though September climatology favors highs near 79°F and leaves room for model adjustments before resolution.
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 8 Sep '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 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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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
$46End Date
Sep 8, 2026Market Opened
Sep 6, 2026, 2:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Forecast models from the National Weather Service and private outlets currently project a daily maximum near 86°F for Chicago on September 8, driven by southerly flow, partly sunny skies, and surface temperatures building from mid-70s overnight lows. This places the outcome near the upper end of the closely bunched 84–87°F range holding the highest implied probabilities. Key differentiating factors include the exact timing of any afternoon cloud increase or weak frontal passage, which could cap readings in the low-to-mid 80s, versus stronger insolation that would push toward 87–88°F. The setup follows several days of above-normal warmth early in the month, though September climatology favors highs near 79°F and leaves room for model adjustments before resolution.
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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