TOTAL VOLUME:

$134.1b

24H VOL:

$141,541,542

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,440,096,988

406,065

Markets across

30,522

events

MATCHED EVENTS:

2,692

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

BETA
Dashboards
Tour
All
Highest temperature in Chicago on Sep 27, 2026?
kalshi

Highest temperature in Chicago on Sep 27, 2026?

Volume:
$126,777

71° to 72°

 - Kalshi

71° to 72° - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 28, 2026

Closed: Sep 28, 2:00 AM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

71° to 72°

View
100%
66%
Yes 100¢No 0¢
100¢
N/A
$22,437
N/A
N/A
$14,621
Settled
Yes
kalshi

69° to 70°

0%
51%
Yes 0¢No 100¢
100¢
N/A
$38,258
N/A
N/A
$32,148
Settled
No
kalshi

67° to 68°

0%
10%
Yes 0¢No 100¢
100¢
N/A
$36,008
N/A
N/A
$31,893
Settled
No
kalshi

73° to 74°

0%
2%
Yes 0¢No 100¢
100¢
N/A
$15,113
N/A
N/A
$8,532
Settled
No
kalshi

66° or below

0%
4%
Yes 0¢No 100¢
100¢
N/A
$11,402
N/A
N/A
$9,586
Settled
No
kalshi

75° or above

0%
Yes 0¢No 100¢
100¢
N/A
$3,560
N/A
N/A
$3,192
Settled
No
Total markets: 6

Description

This event tracks the highest temperature reached in Chicago on a specific date in the future, using data from a designated weather provider. The outcome depends entirely on the official temperature recording for that day, reflecting climate conditions and forecasting challenges.

Kalshi

The event resolves based on the maximum temperature recorded in Chicago (CLIMDW) on September 27, 2026, as reported by The Weather Company. Six separate temperature ranges are defined, each corresponding to a different market outcome. If the temperature falls within any of the specified ranges—from 66°F or below up to 75°F or above—the associated market resolves to Yes. All markets use The Weather Company as the sole source for official data, with recognition that preliminary readings may differ from final values due to rounding or conversion. The Exchange retains discretion to delay resolution if a material error is identified in the initial data publication, allowing time for correction or proceeding to the Expiration Date. If data remains unavailable by the end of the evaluation period, markets resolve to the last fair price determined by Kalshi. The "Final" status on The Weather Company’s platform is informational and does not guarantee immunity from data revisions or errors.