Short-range forecast consensus from NWS and private models indicates Chicago overnight lows on September 17 will likely settle in the mid-to-upper 60s°F, driven by persistent cloud cover, elevated dew points near 60°F, and light southerly flow that limits radiational cooling. These conditions follow recent showers and thunderstorms, which have kept surface temperatures above seasonal normals (historical average low near 58°F). Minor model differences in the timing of any partial clearing or subtle wind shifts could shift the exact minimum across the tightly bunched 64–71°F outcome bins that dominate trader positioning. Updated NHC guidance and local model runs through September 16 remain the key near-term catalysts for any rebalancing.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Chicago on September 17?
Lowest temperature in Chicago on September 17?
66-67°F 40%
68-69°F 40%
64-65°F 39%
70-71°F 39%
NEW
NEW
Sep 17, 2026
59°F or below
7%
60-61°F
11%
62-63°F
19%
64-65°F
39%
66-67°F
40%
68-69°F
40%
70-71°F
39%
72-73°F
18%
74-75°F
11%
76-77°F
7%
78°F or higher
5%
66-67°F 40%
68-69°F 40%
64-65°F 39%
70-71°F 39%
NEW
NEW
Sep 17, 2026
59°F or below
$0 Vol.
7%
60-61°F
$0 Vol.
11%
62-63°F
$0 Vol.
19%
64-65°F
$0 Vol.
39%
66-67°F
$0 Vol.
40%
68-69°F
$0 Vol.
40%
70-71°F
$0 Vol.
39%
72-73°F
$0 Vol.
18%
74-75°F
$0 Vol.
11%
76-77°F
$0 Vol.
7%
78°F or higher
$0 Vol.
5%
This market will resolve to the temperature range that contains the lowest 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 lowest 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.Short-range forecast consensus from NWS and private models indicates Chicago overnight lows on September 17 will likely settle in the mid-to-upper 60s°F, driven by persistent cloud cover, elevated dew points near 60°F, and light southerly flow that limits radiational cooling. These conditions follow recent showers and thunderstorms, which have kept surface temperatures above seasonal normals (historical average low near 58°F). Minor model differences in the timing of any partial clearing or subtle wind shifts could shift the exact minimum across the tightly bunched 64–71°F outcome bins that dominate trader positioning. Updated NHC guidance and local model runs through September 16 remain the key near-term catalysts for any rebalancing.
This market will resolve to the temperature range that contains the lowest 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 lowest 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 lowest 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, 3:29 AM ET
Volume
$0End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 3:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest 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 lowest 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.Short-range forecast consensus from NWS and private models indicates Chicago overnight lows on September 17 will likely settle in the mid-to-upper 60s°F, driven by persistent cloud cover, elevated dew points near 60°F, and light southerly flow that limits radiational cooling. These conditions follow recent showers and thunderstorms, which have kept surface temperatures above seasonal normals (historical average low near 58°F). Minor model differences in the timing of any partial clearing or subtle wind shifts could shift the exact minimum across the tightly bunched 64–71°F outcome bins that dominate trader positioning. Updated NHC guidance and local model runs through September 16 remain the key near-term catalysts for any rebalancing.
This market will resolve to the temperature range that contains the lowest 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 lowest 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 lowest 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
$0End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 3:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Short-range forecast consensus from NWS and private models indicates Chicago overnight lows on September 17 will likely settle in the mid-to-upper 60s°F, driven by persistent cloud cover, elevated dew points near 60°F, and light southerly flow that limits radiational cooling. These conditions follow recent showers and thunderstorms, which have kept surface temperatures above seasonal normals (historical average low near 58°F). Minor model differences in the timing of any partial clearing or subtle wind shifts could shift the exact minimum across the tightly bunched 64–71°F outcome bins that dominate trader positioning. Updated NHC guidance and local model runs through September 16 remain the key near-term catalysts for any rebalancing.
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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