Recent National Weather Service forecasts indicate a high near 75°F for Chicago on September 17 under mostly cloudy skies with a 40% chance of showers, particularly in the morning, as a moist northeast flow limits solar heating and promotes afternoon convection. Model consensus supports mid-70s readings, consistent with seasonal averages around 76°F, though persistent cloud cover and light northerly winds could cap peaks in the low-to-mid 70s if precipitation arrives earlier or more extensively. Trader sentiment clusters tightly on 72–77°F bins because small shifts in timing of cloud breaks or shower intensity—key variables in short-range guidance—directly influence maximum temperature resolution, with drier breaks favoring the upper end of that 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 17?
Highest temperature in Chicago on September 17?
74-75°F 33%
76-77°F 26%
72-73°F 24%
78-79°F 14%
NEW
NEW
Sep 17, 2026
69°F or below
<1%
70-71°F
2%
72-73°F
24%
74-75°F
33%
76-77°F
26%
78-79°F
14%
80-81°F
7%
82-83°F
<1%
84-85°F
<1%
86-87°F
<1%
88°F or higher
<1%
74-75°F 33%
76-77°F 26%
72-73°F 24%
78-79°F 14%
NEW
NEW
Sep 17, 2026
69°F or below
$1,135 Vol.
<1%
70-71°F
$301 Vol.
2%
72-73°F
$1,642 Vol.
24%
74-75°F
$1,441 Vol.
33%
76-77°F
$1,349 Vol.
26%
78-79°F
$723 Vol.
14%
80-81°F
$1,283 Vol.
7%
82-83°F
$145 Vol.
<1%
84-85°F
$121 Vol.
<1%
86-87°F
$111 Vol.
<1%
88°F or higher
$201 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 17 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.Recent National Weather Service forecasts indicate a high near 75°F for Chicago on September 17 under mostly cloudy skies with a 40% chance of showers, particularly in the morning, as a moist northeast flow limits solar heating and promotes afternoon convection. Model consensus supports mid-70s readings, consistent with seasonal averages around 76°F, though persistent cloud cover and light northerly winds could cap peaks in the low-to-mid 70s if precipitation arrives earlier or more extensively. Trader sentiment clusters tightly on 72–77°F bins because small shifts in timing of cloud breaks or shower intensity—key variables in short-range guidance—directly influence maximum temperature resolution, with drier breaks favoring the upper end of that 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 17 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 15, 2026, 3:56 AM ET
Volume
$8,452End Date
Sep 17, 2026Market Opened
Sep 15, 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 17 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.Recent National Weather Service forecasts indicate a high near 75°F for Chicago on September 17 under mostly cloudy skies with a 40% chance of showers, particularly in the morning, as a moist northeast flow limits solar heating and promotes afternoon convection. Model consensus supports mid-70s readings, consistent with seasonal averages around 76°F, though persistent cloud cover and light northerly winds could cap peaks in the low-to-mid 70s if precipitation arrives earlier or more extensively. Trader sentiment clusters tightly on 72–77°F bins because small shifts in timing of cloud breaks or shower intensity—key variables in short-range guidance—directly influence maximum temperature resolution, with drier breaks favoring the upper end of that 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 17 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
$8,452End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 3:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Recent National Weather Service forecasts indicate a high near 75°F for Chicago on September 17 under mostly cloudy skies with a 40% chance of showers, particularly in the morning, as a moist northeast flow limits solar heating and promotes afternoon convection. Model consensus supports mid-70s readings, consistent with seasonal averages around 76°F, though persistent cloud cover and light northerly winds could cap peaks in the low-to-mid 70s if precipitation arrives earlier or more extensively. Trader sentiment clusters tightly on 72–77°F bins because small shifts in timing of cloud breaks or shower intensity—key variables in short-range guidance—directly influence maximum temperature resolution, with drier breaks favoring the upper end of that 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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