Recent National Weather Service and WeatherBug forecasts for Chicago on September 9 show a daytime high near 80–86°F with an 80% chance of showers and thunderstorms, followed by an overnight low in the mid-60s amid southwest winds of 10–15 mph. This setup creates uncertainty in the minimum temperature, as increased cloud cover, precipitation, and mixing from the approaching system limit nocturnal radiative cooling compared to clearer, calmer conditions. Historical September 9 lows average 61.5°F, but recent model runs and current humidity levels support trader consensus reflected in the near-even market-implied odds between 67°F or below and 86°F or higher. Updated NWS briefings and next model cycles will refine the temperature trajectory before resolution.
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 9?
Lowest temperature in Chicago on September 9?
67°F or below 98%
86°F or higher 98%
68-69°F 49%
74-75°F 49%
NEW
NEW
Sep 9, 2026
67°F or below
98%
68-69°F
49%
70-71°F
26%
72-73°F
26%
74-75°F
49%
76-77°F
49%
78-79°F
48%
80-81°F
48%
82-83°F
48%
84-85°F
48%
86°F or higher
98%
67°F or below 98%
86°F or higher 98%
68-69°F 49%
74-75°F 49%
NEW
NEW
Sep 9, 2026
67°F or below
$0 Vol.
98%
68-69°F
$0 Vol.
49%
70-71°F
$0 Vol.
26%
72-73°F
$0 Vol.
26%
74-75°F
$0 Vol.
49%
76-77°F
$0 Vol.
49%
78-79°F
$0 Vol.
48%
80-81°F
$0 Vol.
48%
82-83°F
$0 Vol.
48%
84-85°F
$0 Vol.
48%
86°F or higher
$0 Vol.
98%
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 9 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.Recent National Weather Service and WeatherBug forecasts for Chicago on September 9 show a daytime high near 80–86°F with an 80% chance of showers and thunderstorms, followed by an overnight low in the mid-60s amid southwest winds of 10–15 mph. This setup creates uncertainty in the minimum temperature, as increased cloud cover, precipitation, and mixing from the approaching system limit nocturnal radiative cooling compared to clearer, calmer conditions. Historical September 9 lows average 61.5°F, but recent model runs and current humidity levels support trader consensus reflected in the near-even market-implied odds between 67°F or below and 86°F or higher. Updated NWS briefings and next model cycles will refine the temperature trajectory before resolution.
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 9 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 7, 2026, 3:29 AM ET
Volume
$0End Date
Sep 9, 2026Market Opened
Sep 7, 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 9 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.Recent National Weather Service and WeatherBug forecasts for Chicago on September 9 show a daytime high near 80–86°F with an 80% chance of showers and thunderstorms, followed by an overnight low in the mid-60s amid southwest winds of 10–15 mph. This setup creates uncertainty in the minimum temperature, as increased cloud cover, precipitation, and mixing from the approaching system limit nocturnal radiative cooling compared to clearer, calmer conditions. Historical September 9 lows average 61.5°F, but recent model runs and current humidity levels support trader consensus reflected in the near-even market-implied odds between 67°F or below and 86°F or higher. Updated NWS briefings and next model cycles will refine the temperature trajectory before resolution.
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 9 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 9, 2026Market Opened
Sep 7, 2026, 3:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Recent National Weather Service and WeatherBug forecasts for Chicago on September 9 show a daytime high near 80–86°F with an 80% chance of showers and thunderstorms, followed by an overnight low in the mid-60s amid southwest winds of 10–15 mph. This setup creates uncertainty in the minimum temperature, as increased cloud cover, precipitation, and mixing from the approaching system limit nocturnal radiative cooling compared to clearer, calmer conditions. Historical September 9 lows average 61.5°F, but recent model runs and current humidity levels support trader consensus reflected in the near-even market-implied odds between 67°F or below and 86°F or higher. Updated NWS briefings and next model cycles will refine the temperature trajectory before resolution.
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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