**Official National Weather Service forecasts for Chicago on September 20, 2026, call for a daytime high near 68°F under persistent cloud cover, widespread showers, and breezy northeast winds of 15–20 mph with gusts to 30 mph.** These conditions limit solar heating and advect cooler air from the Great Lakes region, keeping temperatures well below the late-September climatological average of roughly 74°F. Model consensus and recent observations reinforce this cool, stable regime, positioning the 68–69°F bin as the modal outcome in trader pricing while assigning meaningful but secondary probability to 70–71°F if breaks in the clouds allow modest additional warming. Higher bins remain low-probability given the entrenched onshore flow and precipitation, and resolution will hinge on the official daily maximum reported by Chicago-area observing stations.
Eksperimental na AI-generated summary na nire-reference ang Polymarket data. Hindi ito trading advice at wala itong papel sa kung paano nire-resolve ang market na ito. · Na-updateHighest temperature in Chicago on September 20?
Highest temperature in Chicago on September 20?
70-71°F 58%
68-69°F 32%
72-73°F 8%
74-75°F 1.0%
$45,692 Vol.
$45,692 Vol.
Sep 20, 2026
59°F or below
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
<1%
66-67°F
1%
68-69°F
32%
70-71°F
58%
72-73°F
8%
74-75°F
1%
76-77°F
<1%
78°F or higher
<1%
70-71°F 58%
68-69°F 32%
72-73°F 8%
74-75°F 1.0%
$45,692 Vol.
$45,692 Vol.
Sep 20, 2026
59°F or below
$604 Vol.
<1%
60-61°F
$111 Vol.
<1%
62-63°F
$3,264 Vol.
<1%
64-65°F
$4,105 Vol.
<1%
66-67°F
$21,121 Vol.
1%
68-69°F
$6,821 Vol.
32%
70-71°F
$3,933 Vol.
58%
72-73°F
$2,819 Vol.
8%
74-75°F
$2,012 Vol.
1%
76-77°F
$781 Vol.
<1%
78°F or higher
$121 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 20 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 20, 2026, call for a daytime high near 68°F under persistent cloud cover, widespread showers, and breezy northeast winds of 15–20 mph with gusts to 30 mph.** These conditions limit solar heating and advect cooler air from the Great Lakes region, keeping temperatures well below the late-September climatological average of roughly 74°F. Model consensus and recent observations reinforce this cool, stable regime, positioning the 68–69°F bin as the modal outcome in trader pricing while assigning meaningful but secondary probability to 70–71°F if breaks in the clouds allow modest additional warming. Higher bins remain low-probability given the entrenched onshore flow and precipitation, and resolution will hinge on the official daily maximum reported by Chicago-area observing stations.
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 20 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.
Binuksan ang Market: Sep 18, 2026, 2:56 AM ET
Volume
$45,692Petsa ng Pagtatapos
Sep 20, 2026Binuksan ang Market
Sep 18, 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 20 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 20, 2026, call for a daytime high near 68°F under persistent cloud cover, widespread showers, and breezy northeast winds of 15–20 mph with gusts to 30 mph.** These conditions limit solar heating and advect cooler air from the Great Lakes region, keeping temperatures well below the late-September climatological average of roughly 74°F. Model consensus and recent observations reinforce this cool, stable regime, positioning the 68–69°F bin as the modal outcome in trader pricing while assigning meaningful but secondary probability to 70–71°F if breaks in the clouds allow modest additional warming. Higher bins remain low-probability given the entrenched onshore flow and precipitation, and resolution will hinge on the official daily maximum reported by Chicago-area observing stations.
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 20 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
$45,692Petsa ng Pagtatapos
Sep 20, 2026Binuksan ang Market
Sep 18, 2026, 2:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...**Official National Weather Service forecasts for Chicago on September 20, 2026, call for a daytime high near 68°F under persistent cloud cover, widespread showers, and breezy northeast winds of 15–20 mph with gusts to 30 mph.** These conditions limit solar heating and advect cooler air from the Great Lakes region, keeping temperatures well below the late-September climatological average of roughly 74°F. Model consensus and recent observations reinforce this cool, stable regime, positioning the 68–69°F bin as the modal outcome in trader pricing while assigning meaningful but secondary probability to 70–71°F if breaks in the clouds allow modest additional warming. Higher bins remain low-probability given the entrenched onshore flow and precipitation, and resolution will hinge on the official daily maximum reported by Chicago-area observing stations.
Eksperimental na AI-generated summary na nire-reference ang Polymarket data. Hindi ito trading advice at wala itong papel sa kung paano nire-resolve ang market na ito. · Na-update
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