Current National Weather Service forecasts for Chicago on September 13 point to a daily high near 72–73°F under northerly winds and increasing afternoon cloud cover with a 40% chance of scattered showers, limiting surface heating. This consensus from official model guidance and early observations drives the market’s heaviest positioning on 74–75°F at 47% implied probability, with 72–73°F close behind. Northerly flow and modest dew points have kept morning temperatures in the upper 60s, consistent with cooler-than-average September conditions relative to the 1991–2020 high of 77°F. Updated short-range runs and any late-day clearing remain key variables that could shift the exact maximum within the narrow 72–76°F band favored by traders.
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 13?
Highest temperature in Chicago on September 13?
74-75°F 50%
72-73°F 25%
76-77°F 18%
70-71°F 3%
$12,004 Vol.
$12,004 Vol.
Sep 13, 2026
67°F or below
<1%
68-69°F
<1%
70-71°F
3%
72-73°F
25%
74-75°F
50%
76-77°F
18%
78-79°F
3%
80-81°F
<1%
82-83°F
<1%
84-85°F
<1%
86°F or higher
<1%
74-75°F 50%
72-73°F 25%
76-77°F 18%
70-71°F 3%
$12,004 Vol.
$12,004 Vol.
Sep 13, 2026
67°F or below
$235 Vol.
<1%
68-69°F
$363 Vol.
<1%
70-71°F
$5,164 Vol.
3%
72-73°F
$1,133 Vol.
25%
74-75°F
$1,966 Vol.
50%
76-77°F
$1,444 Vol.
18%
78-79°F
$850 Vol.
3%
80-81°F
$187 Vol.
<1%
82-83°F
$325 Vol.
<1%
84-85°F
$125 Vol.
<1%
86°F or higher
$213 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 13 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 forecasts for Chicago on September 13 point to a daily high near 72–73°F under northerly winds and increasing afternoon cloud cover with a 40% chance of scattered showers, limiting surface heating. This consensus from official model guidance and early observations drives the market’s heaviest positioning on 74–75°F at 47% implied probability, with 72–73°F close behind. Northerly flow and modest dew points have kept morning temperatures in the upper 60s, consistent with cooler-than-average September conditions relative to the 1991–2020 high of 77°F. Updated short-range runs and any late-day clearing remain key variables that could shift the exact maximum within the narrow 72–76°F band favored by traders.
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 13 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 11, 2026, 2:56 AM ET
Volume
$12,004End Date
Sep 13, 2026Market Opened
Sep 11, 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 13 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 forecasts for Chicago on September 13 point to a daily high near 72–73°F under northerly winds and increasing afternoon cloud cover with a 40% chance of scattered showers, limiting surface heating. This consensus from official model guidance and early observations drives the market’s heaviest positioning on 74–75°F at 47% implied probability, with 72–73°F close behind. Northerly flow and modest dew points have kept morning temperatures in the upper 60s, consistent with cooler-than-average September conditions relative to the 1991–2020 high of 77°F. Updated short-range runs and any late-day clearing remain key variables that could shift the exact maximum within the narrow 72–76°F band favored by traders.
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 13 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
$12,004End Date
Sep 13, 2026Market Opened
Sep 11, 2026, 2:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Current National Weather Service forecasts for Chicago on September 13 point to a daily high near 72–73°F under northerly winds and increasing afternoon cloud cover with a 40% chance of scattered showers, limiting surface heating. This consensus from official model guidance and early observations drives the market’s heaviest positioning on 74–75°F at 47% implied probability, with 72–73°F close behind. Northerly flow and modest dew points have kept morning temperatures in the upper 60s, consistent with cooler-than-average September conditions relative to the 1991–2020 high of 77°F. Updated short-range runs and any late-day clearing remain key variables that could shift the exact maximum within the narrow 72–76°F band favored by traders.
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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