TOTAL VOLUME:

$134.1b

24H VOL:

$113,466,932

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,423,222,590

402,751

Markets across

30,217

events

MATCHED EVENTS:

2,632

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Highest temperature in Boston on Aug 18, 2026?
kalshi

Highest temperature in Boston on Aug 18, 2026?

Volume:
$14,302

78° or below

 - Kalshi

78° or below - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Aug 19, 2026

Closed: Aug 19, 1:00 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

78° or below

View
100%
12%
Yes 100¢No 0¢
100¢
N/A
$6,597
N/A
N/A
$4,741
Settled
Yes
kalshi

79° to 80°

0%
10%
Yes 0¢No 100¢
100¢
N/A
$4,005
N/A
N/A
$2,654
Settled
No
kalshi

81° to 82°

0%
2%
Yes 0¢No 100¢
100¢
N/A
$1,209
N/A
N/A
$855
Settled
No
kalshi

83° to 84°

0%
Yes 0¢No 100¢
100¢
N/A
$853
N/A
N/A
$545
Settled
No
kalshi

85° to 86°

0%
1%
Yes 0¢No 100¢
100¢
N/A
$832
N/A
N/A
$607
Settled
No
kalshi

87° or above

0%
Yes 0¢No 100¢
100¢
N/A
$806
N/A
N/A
$626
Settled
No
Total markets: 6

Description

This event tracks the highest temperature expected in Boston on a specific date in the future. It uses a trusted weather data provider to determine the outcome, ensuring consistency and reliability. Participants can speculate on whether the temperature will fall within certain ranges or exceed a specific threshold.

Kalshi

The event resolves based on the maximum temperature recorded at Boston's official weather station (CLIBOS) on August 18, 2026, as reported by The Weather Company. Six distinct temperature ranges are defined, each corresponding to a different market outcome. If the temperature falls within any of these specified ranges — from 78°F or below, through incremental bands up to 87°F or above — the associated market will resolve to Yes. All markets share the same data source and methodology, ensuring uniformity in evaluation. While other weather services may show different values, The Weather Company's report is the sole authority for determining the final result.