Official National Weather Service forecasts for Chicago on September 22 indicate a high near 62°F under mostly cloudy skies with a slight chance of showers and persistent northeast winds of 10-15 mph with gusts to 20 mph. This onshore flow from Lake Michigan, combined with widespread cloud cover, has suppressed daytime warming well below the late-September climatological average of 73-74°F, keeping hourly readings in the 60-62°F range through afternoon. Model consensus and recent observations show limited potential for further rise, concentrating trader-implied probabilities on the 60-61°F and 62-63°F bins. Updated NWS guidance and any clearing trends before sunset represent the key near-term variables that could shift the daily maximum within the narrow observed range.
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 22?
Highest temperature in Chicago on September 22?
60-61°F 96%
62-63°F 5%
64-65°F <1%
66-67°F <1%
$52,458 Vol.
$52,458 Vol.
Sep 22, 2026
53°F or below
<1%
54-55°F
<1%
56-57°F
<1%
58-59°F
<1%
60-61°F
96%
62-63°F
5%
64-65°F
<1%
66-67°F
<1%
68-69°F
<1%
70-71°F
<1%
72°F or higher
<1%
60-61°F 96%
62-63°F 5%
64-65°F <1%
66-67°F <1%
$52,458 Vol.
$52,458 Vol.
Sep 22, 2026
53°F or below
$1,145 Vol.
<1%
54-55°F
$3,991 Vol.
<1%
56-57°F
$4,201 Vol.
<1%
58-59°F
$7,242 Vol.
<1%
60-61°F
$11,469 Vol.
96%
62-63°F
$8,692 Vol.
5%
64-65°F
$7,552 Vol.
<1%
66-67°F
$5,150 Vol.
<1%
68-69°F
$1,593 Vol.
<1%
70-71°F
$650 Vol.
<1%
72°F or higher
$774 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 22 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.Official National Weather Service forecasts for Chicago on September 22 indicate a high near 62°F under mostly cloudy skies with a slight chance of showers and persistent northeast winds of 10-15 mph with gusts to 20 mph. This onshore flow from Lake Michigan, combined with widespread cloud cover, has suppressed daytime warming well below the late-September climatological average of 73-74°F, keeping hourly readings in the 60-62°F range through afternoon. Model consensus and recent observations show limited potential for further rise, concentrating trader-implied probabilities on the 60-61°F and 62-63°F bins. Updated NWS guidance and any clearing trends before sunset represent the key near-term variables that could shift the daily maximum within the narrow observed range.
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 22 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 20, 2026, 3:56 AM ET
Volume
$52,458End Date
Sep 22, 2026Market Opened
Sep 20, 2026, 3:56 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 22 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.Official National Weather Service forecasts for Chicago on September 22 indicate a high near 62°F under mostly cloudy skies with a slight chance of showers and persistent northeast winds of 10-15 mph with gusts to 20 mph. This onshore flow from Lake Michigan, combined with widespread cloud cover, has suppressed daytime warming well below the late-September climatological average of 73-74°F, keeping hourly readings in the 60-62°F range through afternoon. Model consensus and recent observations show limited potential for further rise, concentrating trader-implied probabilities on the 60-61°F and 62-63°F bins. Updated NWS guidance and any clearing trends before sunset represent the key near-term variables that could shift the daily maximum within the narrow observed range.
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 22 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
$52,458End Date
Sep 22, 2026Market Opened
Sep 20, 2026, 3:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Official National Weather Service forecasts for Chicago on September 22 indicate a high near 62°F under mostly cloudy skies with a slight chance of showers and persistent northeast winds of 10-15 mph with gusts to 20 mph. This onshore flow from Lake Michigan, combined with widespread cloud cover, has suppressed daytime warming well below the late-September climatological average of 73-74°F, keeping hourly readings in the 60-62°F range through afternoon. Model consensus and recent observations show limited potential for further rise, concentrating trader-implied probabilities on the 60-61°F and 62-63°F bins. Updated NWS guidance and any clearing trends before sunset represent the key near-term variables that could shift the daily maximum within the narrow observed range.
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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