KalshiCheck availabilityKYC required2% feeVerified resolution dataRoughly calibratedCurrent implied probability80° to 81° 46.6%Leader of 6 outcomes
Market quality
68 / 100
Medium quality24h Volume
$9.9K
Liquidity
$8K
Medium liquidityBid / Ask
36.0% / 39.0%
Spread
3.0 pt
Moderate spreadMarket data
Updated 37 minutes ago
Jul 28, 26, 2:00 PMJul 30, 26, 5:59 AM
Trends
Paper funds only — no real moneyNot financial advice
Selected outcome
79° or below38%
Compare venues· 80° to 81°
Ranked by market quality, then liquidity and 24h volume
Also available on Gemini
Highest temperature in Chicago on July 29, 2026?
19h
50.5%
34.7%
11.2%
+2 more outcomes
44 • Low qualityModerate spreadLow liquidityThin market
Total Vol$55
24h Vol$55
GEMINI
Also available on Polymarket
Highest temperature in Chicago on July 29?
0.3 pts3h
+9.0pt55.8%
+4.0pt29.5%
-14.0pt8.4%
+8 more outcomes
76 • High qualityTight spreadMedium liquidityHigh ambiguity
Total Vol$17.9K
24h Vol$12.9K
POLYMARKETRules
If the highest temperature recorded at Chicago Midway, IL for July 29, 2026, is less than 80° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.
- Not all weather data is the same.
- While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above.
- Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances.
- Traders should exercise caution when interpreting preliminary NWS data.
- If the highest temperature recorded at Chicago Midway, IL for July 29, 2026, is between 80-81° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.
Probabilities may differ due to different market structures, fees, and participant pools.
Volume trend
$9.9kJul 282d of dataJul 29
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If the highest temperature recorded at Chicago Midway, IL for July 29, 2026, is less than 80° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.
- Not all weather data is the same.
- While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above.
- Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances.
- Traders should exercise caution when interpreting preliminary NWS data.
- If the highest temperature recorded at Chicago Midway, IL for July 29, 2026, is between 80-81° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.