PolymarketCheck availabilityNo KYC2% feeVerified resolution dataFairly calibratedCurrent implied probability88-89°F 29.5%Leader of 11 outcomes
Market quality
80 / 100
High quality24h Volume
$32.3K
Liquidity
$50.3K
High liquidityBid / Ask
2.0% / 2.4%
Spread
0.4 pt
Tight spreadMarket data
Updated 17 minutes ago
Jul 26, 26, 7:02 AMJul 27, 26, 12:00 PM
Trends
Paper funds only — no real moneyNot financial advice
Selected outcome
88-89°F31%
Compare venues· 88-89°F
Ranked by market quality, then liquidity and 24h volume
Also available on Kalshi
Highest temperature in Chicago on Jul 27, 2026?
1d
42.3%
24.3%
18.9%
+3 more outcomes
69 • Medium qualityTight spreadMedium liquidityHigh ambiguity
Total Vol$12.5K
24h Vol$12.5K
KALSHI
Also available on Gemini
Highest temperature in Chicago on July 27, 2026?
23h
44%
23.1%
19.4%
+2 more outcomes
40 • Low qualityModerate spreadLow liquidityThin market
Total Vol$10
24h Vol$10
GEMINIRules
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 27 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.
Probabilities may differ due to different market structures, fees, and participant pools.
Volume trend
$32.3kJul 262d of dataJul 27
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Rules
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 27 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.