TOTAL VOLUME:

$134.1b

24H VOL:

$133,388,117

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,436,095,462

405,232

Markets across

30,526

events

MATCHED EVENTS:

2,693

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Highest temperature in Chicago on Aug 18, 2026?
kalshi

Highest temperature in Chicago on Aug 18, 2026?

Volume:
$105,580

80° to 81°

 - Kalshi

80° to 81° - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Aug 19, 2026

Closed: Aug 19, 2:00 AM EST

kalshi

Kalshi

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

80° to 81°

View
100%
55%
Yes 100¢No 0¢
100¢
N/A
$36,865
N/A
N/A
$18,196
Settled
Yes
kalshi

82° to 83°

0%
45%
Yes 0¢No 100¢
100¢
N/A
$41,396
N/A
N/A
$30,553
Settled
No
kalshi

78° to 79°

0%
2%
Yes 0¢No 100¢
100¢
N/A
$11,762
N/A
N/A
$8,407
Settled
No
kalshi

84° to 85°

0%
12%
Yes 0¢No 100¢
100¢
N/A
$11,565
N/A
N/A
$9,555
Settled
No
kalshi

77° or below

0%
1%
Yes 0¢No 100¢
100¢
N/A
$2,370
N/A
N/A
$2,107
Settled
No
kalshi

86° or above

0%
1%
Yes 0¢No 100¢
100¢
N/A
$1,621
N/A
N/A
$1,586
Settled
No
Total markets: 6

Description

In Chicago, August 18, 2026, may bring heat typical of late summer, with temperatures influenced by lake effects and regional highs that could shift dramatically throughout the day.

Kalshi

The market resolves based on the maximum temperature at Chicago (CLIMDW) on August 18, 2026, as officially reported by The Weather Company. Six temperature bands are defined, and a Yes outcome occurs if the actual maximum falls within any specified band. Secondary instructions confirm that The Weather Company’s data overrides any conflicting reports from alternative weather providers.