Skip to main content
icon for Highest temperature in Chicago on August 27?

Highest temperature in Chicago on August 27?

icon for Highest temperature in Chicago on August 27?

Highest temperature in Chicago on August 27?

Aug 26

Aug 27

Aug 26

Aug 27

80-81°F 55%

82-83°F 20%

78-79°F 16%

84-85°F 5%

Polymarket
NEW

80-81°F 55%

82-83°F 20%

78-79°F 16%

84-85°F 5%

Polymarket
NEW

73°F or below

$283 Vol.

<1%

74-75°F

$173 Vol.

2%

76-77°F

$87 Vol.

4%

78-79°F

$258 Vol.

16%

80-81°F

$400 Vol.

55%

82-83°F

$219 Vol.

20%

84-85°F

$111 Vol.

5%

86-87°F

$0 Vol.

1%

88-89°F

$110 Vol.

1%

90-91°F

$13 Vol.

<1%

92°F or higher

$253 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 27 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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 guidance point to a cooler air mass and northwest-to-northeast winds moderating temperatures in Chicago on August 27, supporting the market's emphasis on the 80-81°F bin. Official forecasts project highs near 75-78°F inland with mid-70s readings near the lake under partly cloudy skies and only slight shower chances, limiting daytime heating. This aligns with the seasonal decline in solar angle and the influence of Lake Michigan's thermal inertia. The 82-83°F outcome remains viable if cloud cover decreases or winds weaken, while lower bins reflect the risk of stronger onshore flow. Traders are weighing the latest NWS updates against historical August averages near 81°F as new model runs arrive.

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 27 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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
$1,888
End Date
Aug 27, 2026
Market Opened
Aug 25, 2026, 8:56 PM ET

Resolution Source

https://www.weather.gov/wrh/timeseries?site=kord

Resolver

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 27 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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.
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 27 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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 guidance point to a cooler air mass and northwest-to-northeast winds moderating temperatures in Chicago on August 27, supporting the market's emphasis on the 80-81°F bin. Official forecasts project highs near 75-78°F inland with mid-70s readings near the lake under partly cloudy skies and only slight shower chances, limiting daytime heating. This aligns with the seasonal decline in solar angle and the influence of Lake Michigan's thermal inertia. The 82-83°F outcome remains viable if cloud cover decreases or winds weaken, while lower bins reflect the risk of stronger onshore flow. Traders are weighing the latest NWS updates against historical August averages near 81°F as new model runs arrive.

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 27 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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
$1,888
End Date
Aug 27, 2026
Market Opened
Aug 25, 2026, 8:56 PM ET

Resolution Source

https://www.weather.gov/wrh/timeseries?site=kord

Resolver

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 27 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary 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.

Related

icon for Will the highest temperature in Chicago be between 84-85°F on August 26?

Will the highest temperature in Chicago be between 84-85°F on August 26?

45%
icon for Will the lowest temperature in Chicago be between 64-65°F on August 27?

Will the lowest temperature in Chicago be between 64-65°F on August 27?

36%
icon for Will the lowest temperature in Chicago be between 68-69°F on August 26?

Will the lowest temperature in Chicago be between 68-69°F on August 26?

47%

Beware of external links.

Frequently Asked Questions

"Highest temperature in Chicago on August 27?" is a prediction market on Polymarket with 11 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "80-81°F" at 56%, followed by "82-83°F" at 20%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 56¢ implies that the market collectively assigns a 56% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Highest temperature in Chicago on August 27?" is a newly created market on Polymarket, launched on Aug 25, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Highest temperature in Chicago on August 27?," browse the 11 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Highest temperature in Chicago on August 27?" is "80-81°F" at 56%, meaning the market assigns a 56% chance to that outcome. The next closest outcome is "82-83°F" at 20%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Highest temperature in Chicago on August 27?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.