**National Weather Service forecasts for Chicago on September 16, 2026, call for a high near 72°F under mostly cloudy skies with a 40% chance of showers, driven by northeasterly flow and limited solar heating from persistent cloud cover.** This setup suppresses temperatures below the 76°F climatological average for the date. Hourly model guidance and observational trends show peaks holding in the low 70s, aligning with the market's leading 72-73°F bin at 51% implied probability. The secondary 74-75°F outcome at 35.5% reflects minor upside risk if breaks in clouds allow brief warming before evening. Resolution depends on official airport observations, with no major model shifts reported in the latest updates.
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 16?
Highest temperature in Chicago on September 16?
72-73°F 51%
74-75°F 36%
70-71°F 8%
76-77°F 4%
$26,856 Vol.
$26,856 Vol.
Sep 16, 2026
63°F or below
<1%
64-65°F
<1%
66-67°F
<1%
68-69°F
<1%
70-71°F
8%
72-73°F
51%
74-75°F
36%
76-77°F
4%
78-79°F
1%
80-81°F
<1%
82°F or higher
<1%
72-73°F 51%
74-75°F 36%
70-71°F 8%
76-77°F 4%
$26,856 Vol.
$26,856 Vol.
Sep 16, 2026
63°F or below
$239 Vol.
<1%
64-65°F
$325 Vol.
<1%
66-67°F
$133 Vol.
<1%
68-69°F
$6,135 Vol.
<1%
70-71°F
$7,653 Vol.
8%
72-73°F
$6,133 Vol.
51%
74-75°F
$3,647 Vol.
36%
76-77°F
$1,598 Vol.
4%
78-79°F
$394 Vol.
1%
80-81°F
$360 Vol.
<1%
82°F or higher
$239 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 16 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.**National Weather Service forecasts for Chicago on September 16, 2026, call for a high near 72°F under mostly cloudy skies with a 40% chance of showers, driven by northeasterly flow and limited solar heating from persistent cloud cover.** This setup suppresses temperatures below the 76°F climatological average for the date. Hourly model guidance and observational trends show peaks holding in the low 70s, aligning with the market's leading 72-73°F bin at 51% implied probability. The secondary 74-75°F outcome at 35.5% reflects minor upside risk if breaks in clouds allow brief warming before evening. Resolution depends on official airport observations, with no major model shifts reported in the latest updates.
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 16 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 14, 2026, 3:56 AM ET
Volume
$26,856End Date
Sep 16, 2026Market Opened
Sep 14, 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 16 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.**National Weather Service forecasts for Chicago on September 16, 2026, call for a high near 72°F under mostly cloudy skies with a 40% chance of showers, driven by northeasterly flow and limited solar heating from persistent cloud cover.** This setup suppresses temperatures below the 76°F climatological average for the date. Hourly model guidance and observational trends show peaks holding in the low 70s, aligning with the market's leading 72-73°F bin at 51% implied probability. The secondary 74-75°F outcome at 35.5% reflects minor upside risk if breaks in clouds allow brief warming before evening. Resolution depends on official airport observations, with no major model shifts reported in the latest updates.
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 16 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
$26,856End Date
Sep 16, 2026Market Opened
Sep 14, 2026, 3:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...**National Weather Service forecasts for Chicago on September 16, 2026, call for a high near 72°F under mostly cloudy skies with a 40% chance of showers, driven by northeasterly flow and limited solar heating from persistent cloud cover.** This setup suppresses temperatures below the 76°F climatological average for the date. Hourly model guidance and observational trends show peaks holding in the low 70s, aligning with the market's leading 72-73°F bin at 51% implied probability. The secondary 74-75°F outcome at 35.5% reflects minor upside risk if breaks in clouds allow brief warming before evening. Resolution depends on official airport observations, with no major model shifts reported in the latest updates.
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