**Current National Weather Service and private forecasts for Chicago on September 8 point to a daytime high in the low-to-mid 80s under southerly flow and partly cloudy skies, driving the market's concentration on the 82–87 °F bins.** Recent model guidance shows modest warming from today's near-80 °F readings, with afternoon temperatures peaking near 82–84 °F before any evening showers develop; this aligns with climatological norms for early September after the recent hot spell (highs near 95 °F earlier in the month) has moderated. Key variables include the strength of south winds, cloud cover limiting insolation, and any last-minute forecast adjustments from the National Weather Service Chicago office or updated model runs overnight. Trader positioning reflects the narrow uncertainty band typical for a 24-hour temperature market, where official observations at O'Hare or Midway will resolve the outcome.
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?
84-85°F 43%
86-87°F 24%
82-83°F 22%
80-81°F 6%
NEW
NEW
Sep 8, 2026
77°F or below
<1%
78-79°F
1%
80-81°F
6%
82-83°F
22%
84-85°F
43%
86-87°F
24%
88-89°F
5%
90-91°F
3%
92-93°F
<1%
94-95°F
<1%
96°F or higher
<1%
84-85°F 43%
86-87°F 24%
82-83°F 22%
80-81°F 6%
NEW
NEW
Sep 8, 2026
77°F or below
$297 Vol.
<1%
78-79°F
$297 Vol.
1%
80-81°F
$604 Vol.
6%
82-83°F
$592 Vol.
22%
84-85°F
$1,240 Vol.
43%
86-87°F
$1,068 Vol.
24%
88-89°F
$641 Vol.
5%
90-91°F
$207 Vol.
3%
92-93°F
$157 Vol.
<1%
94-95°F
$318 Vol.
<1%
96°F or higher
$178 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 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.**Current National Weather Service and private forecasts for Chicago on September 8 point to a daytime high in the low-to-mid 80s under southerly flow and partly cloudy skies, driving the market's concentration on the 82–87 °F bins.** Recent model guidance shows modest warming from today's near-80 °F readings, with afternoon temperatures peaking near 82–84 °F before any evening showers develop; this aligns with climatological norms for early September after the recent hot spell (highs near 95 °F earlier in the month) has moderated. Key variables include the strength of south winds, cloud cover limiting insolation, and any last-minute forecast adjustments from the National Weather Service Chicago office or updated model runs overnight. Trader positioning reflects the narrow uncertainty band typical for a 24-hour temperature market, where official observations at O'Hare or Midway will resolve the outcome.
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
$5,601End 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.**Current National Weather Service and private forecasts for Chicago on September 8 point to a daytime high in the low-to-mid 80s under southerly flow and partly cloudy skies, driving the market's concentration on the 82–87 °F bins.** Recent model guidance shows modest warming from today's near-80 °F readings, with afternoon temperatures peaking near 82–84 °F before any evening showers develop; this aligns with climatological norms for early September after the recent hot spell (highs near 95 °F earlier in the month) has moderated. Key variables include the strength of south winds, cloud cover limiting insolation, and any last-minute forecast adjustments from the National Weather Service Chicago office or updated model runs overnight. Trader positioning reflects the narrow uncertainty band typical for a 24-hour temperature market, where official observations at O'Hare or Midway will resolve the outcome.
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
$5,601End Date
Sep 8, 2026Market Opened
Sep 6, 2026, 2:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...**Current National Weather Service and private forecasts for Chicago on September 8 point to a daytime high in the low-to-mid 80s under southerly flow and partly cloudy skies, driving the market's concentration on the 82–87 °F bins.** Recent model guidance shows modest warming from today's near-80 °F readings, with afternoon temperatures peaking near 82–84 °F before any evening showers develop; this aligns with climatological norms for early September after the recent hot spell (highs near 95 °F earlier in the month) has moderated. Key variables include the strength of south winds, cloud cover limiting insolation, and any last-minute forecast adjustments from the National Weather Service Chicago office or updated model runs overnight. Trader positioning reflects the narrow uncertainty band typical for a 24-hour temperature market, where official observations at O'Hare or Midway will resolve the outcome.
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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Frequently Asked Questions