Recent National Weather Service and model consensus places Chicago’s August 30 high in the upper 80s, with most guidance clustering near 85–87 °F under southwest flow ahead of a warm front. This pattern favors warm-air advection and mixing that supports readings in the 86–87 °F bin, while lingering morning clouds and a modest chance of showers could cap the peak near 84–85 °F if boundary-layer moisture increases. Ensemble spreads remain narrow because steering winds and surface pressure gradients are well-resolved only 24 hours out, keeping lower-probability bins (below 82 °F or above 90 °F) minimal. Updated model runs and afternoon observations tomorrow will provide the final calibration before resolution.
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 August 30?
Highest temperature in Chicago on August 30?
86-87°F 33%
84-85°F 30%
88-89°F 19%
82-83°F 12%
NEW
NEW
Aug 30, 2026
77°F or below
<1%
78-79°F
<1%
80-81°F
5%
82-83°F
12%
84-85°F
30%
86-87°F
33%
88-89°F
19%
90-91°F
5%
92-93°F
<1%
94-95°F
<1%
96°F or higher
<1%
86-87°F 33%
84-85°F 30%
88-89°F 19%
82-83°F 12%
NEW
NEW
Aug 30, 2026
77°F or below
$326 Vol.
<1%
78-79°F
$284 Vol.
<1%
80-81°F
$568 Vol.
5%
82-83°F
$642 Vol.
12%
84-85°F
$569 Vol.
30%
86-87°F
$2,598 Vol.
33%
88-89°F
$1,253 Vol.
19%
90-91°F
$361 Vol.
5%
92-93°F
$91 Vol.
<1%
94-95°F
$215 Vol.
<1%
96°F or higher
$353 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 30 Aug '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.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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 model consensus places Chicago’s August 30 high in the upper 80s, with most guidance clustering near 85–87 °F under southwest flow ahead of a warm front. This pattern favors warm-air advection and mixing that supports readings in the 86–87 °F bin, while lingering morning clouds and a modest chance of showers could cap the peak near 84–85 °F if boundary-layer moisture increases. Ensemble spreads remain narrow because steering winds and surface pressure gradients are well-resolved only 24 hours out, keeping lower-probability bins (below 82 °F or above 90 °F) minimal. Updated model runs and afternoon observations tomorrow will provide the final calibration before resolution.
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 30 Aug '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.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Aug 28, 2026, 10:56 AM ET
Volume
$6,961End Date
Aug 30, 2026Market Opened
Aug 28, 2026, 10:56 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 30 Aug '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.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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 model consensus places Chicago’s August 30 high in the upper 80s, with most guidance clustering near 85–87 °F under southwest flow ahead of a warm front. This pattern favors warm-air advection and mixing that supports readings in the 86–87 °F bin, while lingering morning clouds and a modest chance of showers could cap the peak near 84–85 °F if boundary-layer moisture increases. Ensemble spreads remain narrow because steering winds and surface pressure gradients are well-resolved only 24 hours out, keeping lower-probability bins (below 82 °F or above 90 °F) minimal. Updated model runs and afternoon observations tomorrow will provide the final calibration before resolution.
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 30 Aug '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.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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
$6,961End Date
Aug 30, 2026Market Opened
Aug 28, 2026, 10:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Recent National Weather Service and model consensus places Chicago’s August 30 high in the upper 80s, with most guidance clustering near 85–87 °F under southwest flow ahead of a warm front. This pattern favors warm-air advection and mixing that supports readings in the 86–87 °F bin, while lingering morning clouds and a modest chance of showers could cap the peak near 84–85 °F if boundary-layer moisture increases. Ensemble spreads remain narrow because steering winds and surface pressure gradients are well-resolved only 24 hours out, keeping lower-probability bins (below 82 °F or above 90 °F) minimal. Updated model runs and afternoon observations tomorrow will provide the final calibration 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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