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Highest temperature in Chicago on July 28?

icon for Highest temperature in Chicago on July 28?

Highest temperature in Chicago on July 28?

Jul 28

Jul 29

Jul 30

Jul 28

Jul 29

Jul 30

78-79°F 100.0%

73°F or below <1%

74-75°F <1%

76-77°F <1%

Polymarket

$58,616 Vol.

78-79°F 100.0%

73°F or below <1%

74-75°F <1%

76-77°F <1%

Polymarket

$58,616 Vol.

73°F or below

$15,526 Vol.

<1%

74-75°F

$12,167 Vol.

<1%

76-77°F

$3,122 Vol.

<1%

78-79°F

$5,961 Vol.

100%

80-81°F

$5,098 Vol.

<1%

82-83°F

$5,816 Vol.

<1%

84-85°F

$7,968 Vol.

<1%

86-87°F

$1,472 Vol.

<1%

88-89°F

$606 Vol.

<1%

90-91°F

$490 Vol.

<1%

92°F or higher

$390 Vol.

<1%

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 28 Jul '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.Current National Weather Service and model consensus forecasts for Chicago on July 28 point to a daily maximum near 80°F, below the 1991–2020 climatological normal of 84°F. This cooler trajectory stems from a passing upper-level trough and associated northerly flow advecting milder Canadian air, combined with increased cloud cover that limits daytime heating. Ensemble guidance shows tight clustering around 78–82°F, with limited potential for higher readings if subsidence strengthens or skies clear more than expected. Traders have therefore concentrated probability on the 78–83°F bins, reflecting the latest observational trends and short-range model agreement while acknowledging typical forecast uncertainty this far ahead of peak heating.

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 28 Jul '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
$58,616
End Date
Jul 28, 2026
Market Opened
Jul 26, 2026, 9:03 PM ET

Resolution Source

https://www.wunderground.com/history/daily/us/il/chicago/KORD

Resolver

0x69c47De9D...
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 28 Jul '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 28 Jul '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.Current National Weather Service and model consensus forecasts for Chicago on July 28 point to a daily maximum near 80°F, below the 1991–2020 climatological normal of 84°F. This cooler trajectory stems from a passing upper-level trough and associated northerly flow advecting milder Canadian air, combined with increased cloud cover that limits daytime heating. Ensemble guidance shows tight clustering around 78–82°F, with limited potential for higher readings if subsidence strengthens or skies clear more than expected. Traders have therefore concentrated probability on the 78–83°F bins, reflecting the latest observational trends and short-range model agreement while acknowledging typical forecast uncertainty this far ahead of peak heating.

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 28 Jul '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
$58,616
End Date
Jul 28, 2026
Market Opened
Jul 26, 2026, 9:03 PM ET

Resolution Source

https://www.wunderground.com/history/daily/us/il/chicago/KORD

Resolver

0x69c47De9D...
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 28 Jul '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.

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Frequently Asked Questions

"Highest temperature in Chicago on July 28?" 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 "78-79°F" at 100%, followed by "73°F or below" at 0%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 100¢ implies that the market collectively assigns a 100% 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.

As of today, "Highest temperature in Chicago on July 28?" has generated $58.6K in total trading volume since the market launched on Jul 26, 2026. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "Highest temperature in Chicago on July 28?," 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 July 28?" is "78-79°F" at 100%, meaning the market assigns a 100% chance to that outcome. The next closest outcome is "73°F or below" at 0%. 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 July 28?" 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.