PolymarketCheck availabilityNo KYC2% feeVerified resolution dataWell calibratedCurrent implied probability
72-73°F 42.5%+17.0ptLeader of 11 outcomesVig-adjusted: raw venue quotes summed above 100% and were normalized.
Market quality
68 / 100
Medium quality24h Volume
$10.7K
Liquidity
$39.9K
High liquiditySpread
4.0 pt
Moderate spreadComments
0
Market data
Updated 3 minutes ago
Sep 16, 26, 7:56 AM UTCSep 18, 26, 12:00 PM UTC
Trends
0%
0%
0%
0%
0%
Related Markets
Related questions for context, not a comparison of equivalent contracts.
Highest temperature in Chicago on September 19?
PolymarketLowest temperature in Chicago on September 18?
PolymarketHighest temperature in Chicago on September 17, 2026?
GeminiHighest temperature in Chicago on Sep 17, 2026?
KalshiLowest temperature in Chicago on Sep 17, 2026?
KalshiWill the highest temperature in Chicago (CHI)(MDW)(KMDW) exceed 78 F on September 17, 2026?
ForecastExRules
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 18 Sep '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 for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
- In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
- To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
Prediction Source Comparison
Open markets
WeatherKALSHIWhere will it rain on Sep 17, 2026?
- Minneapolis99%
- Houston99%
- Miami+31.0pt99%
+19 more outcomes
- Total Vol
- $95.1K
- 24h Vol
- $90.6K
KALSHIHighest temperature in Los Angeles on Sep 17, 2026?
- 75° to 76°42.1%
- 77° to 78°39.3%
- 79° to 80°11.2%
+3 more outcomes
- Total Vol
- $66.4K
- 24h Vol
- $65.5K
KALSHIHighest temperature in Miami on Sep 17, 2026?
- 88° to 89°33.9%
- 90° to 91°27.5%
- 86° to 87°19.3%
+3 more outcomes
- Total Vol
- $39.7K
- 24h Vol
- $39.1K
KALSHIHighest temperature in New York City on Sep 17, 2026?
- 80° to 81°45.1%
- 82° to 83°31.4%
- 79° or below16.7%
+3 more outcomes
- Total Vol
- $38.7K
- 24h Vol
- $36.9K
KALSHIHighest temperature in Seattle on Sep 17, 2026?
- 76° to 77°58%
- 74° to 75°24.1%
- 72° to 73°8.9%
+3 more outcomes
- Total Vol
- $31.3K
- 24h Vol
- $31.2K
POLYMARKETHighest temperature in Shanghai on September 18?
- 29°C+13.5pt51%
- 28°C-0.5pt37.5%
- 30°C-6.0pt6.7%
+8 more outcomes
- Highest temperature in Chicago on Sep 17, 2026?
- Highest temperature in Ankara on September 18?
- Highest temperature in Shenzhen on September 18?
- Highest temperature in Tel Aviv on September 18?
- Highest temperature in Guangzhou on September 18?
- Highest temperature in Hong Kong on September 18?
- Highest temperature in Austin on Sep 17, 2026?
- Highest temperature in Singapore on September 18?
- Highest temperature in London on September 18?
- Highest temperature in Busan on September 18?
Frequently asked questions
- What are the current odds for Highest temperature in Chicago on September 18??
- Polymarket prices 72-73°F at 42% as of September 17, 2026.
- When does Highest temperature in Chicago on September 18? resolve?
- Highest temperature in Chicago on September 18? is scheduled to resolve on September 18, 2026.
- How is Highest temperature in Chicago on September 18? settled?
- Polymarket settles this market as follows: 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 18 Sep '26.
- Where else is Highest temperature in Chicago on September 18? listed?
- The same question is also listed on Kalshi, Gemini.