Recent National Weather Service forecasts and model consensus indicate a high near 79–80°F for Chicago on August 19, driven by partly sunny skies, moderate southwest flow, and afternoon cloud cover that limits surface heating below seasonal norms of 82°F. This setup positions the 78–79°F bin as the leading outcome at 41.5% implied probability, followed by 80–81°F at 27%, as variable moisture and a weak frontal boundary suppress peak readings while still allowing typical late-summer warmth. Shorter-range updates from the Weather Prediction Center and local observations will refine these probabilities ahead of market 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 19?
Highest temperature in Chicago on August 19?
78-79°F 41%
80-81°F 28%
76-77°F 19%
82-83°F 9%
NEW
NEW
Aug 19, 2026
67°F or below
<1%
68-69°F
<1%
70-71°F
1%
72-73°F
1%
74-75°F
6%
76-77°F
19%
78-79°F
41%
80-81°F
28%
82-83°F
9%
84-85°F
2%
86°F or higher
<1%
78-79°F 41%
80-81°F 28%
76-77°F 19%
82-83°F 9%
NEW
NEW
Aug 19, 2026
67°F or below
$20 Vol.
<1%
68-69°F
$35 Vol.
<1%
70-71°F
$105 Vol.
1%
72-73°F
$80 Vol.
1%
74-75°F
$156 Vol.
6%
76-77°F
$182 Vol.
19%
78-79°F
$170 Vol.
41%
80-81°F
$100 Vol.
28%
82-83°F
$491 Vol.
9%
84-85°F
$117 Vol.
2%
86°F or higher
$101 Vol.
<1%
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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 forecasts and model consensus indicate a high near 79–80°F for Chicago on August 19, driven by partly sunny skies, moderate southwest flow, and afternoon cloud cover that limits surface heating below seasonal norms of 82°F. This setup positions the 78–79°F bin as the leading outcome at 41.5% implied probability, followed by 80–81°F at 27%, as variable moisture and a weak frontal boundary suppress peak readings while still allowing typical late-summer warmth. Shorter-range updates from the Weather Prediction Center and local observations will refine these probabilities ahead of market resolution.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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 17, 2026, 9:56 PM ET
Volume
$1,556End Date
Aug 19, 2026Market Opened
Aug 17, 2026, 9:56 PM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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 forecasts and model consensus indicate a high near 79–80°F for Chicago on August 19, driven by partly sunny skies, moderate southwest flow, and afternoon cloud cover that limits surface heating below seasonal norms of 82°F. This setup positions the 78–79°F bin as the leading outcome at 41.5% implied probability, followed by 80–81°F at 27%, as variable moisture and a weak frontal boundary suppress peak readings while still allowing typical late-summer warmth. Shorter-range updates from the Weather Prediction Center and local observations will refine these probabilities ahead of market resolution.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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
$1,556End Date
Aug 19, 2026Market Opened
Aug 17, 2026, 9:56 PM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Recent National Weather Service forecasts and model consensus indicate a high near 79–80°F for Chicago on August 19, driven by partly sunny skies, moderate southwest flow, and afternoon cloud cover that limits surface heating below seasonal norms of 82°F. This setup positions the 78–79°F bin as the leading outcome at 41.5% implied probability, followed by 80–81°F at 27%, as variable moisture and a weak frontal boundary suppress peak readings while still allowing typical late-summer warmth. Shorter-range updates from the Weather Prediction Center and local observations will refine these probabilities ahead of market 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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