TOTAL VOLUME:

$134b

24H VOL:

$103,397,351

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,410,176,180

399,592

Markets across

30,097

events

MATCHED EVENTS:

2,622

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

BETA
Dashboards
Tour
All
Highest temperature in Boston on Sep 18, 2026?
kalshi

Highest temperature in Boston on Sep 18, 2026?

Volume:
$24,767

80° to 81°

 - Kalshi

80° to 81° - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 19, 2026

Closed: Sep 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

80° to 81°

View
100%
46%
Yes 100¢No 0¢
100¢
N/A
$6,573
N/A
N/A
$4,948
Settled
Yes
kalshi

82° or above

0%
3%
Yes 0¢No 100¢
100¢
N/A
$6,365
N/A
N/A
$4,271
Settled
No
kalshi

78° to 79°

0%
37%
Yes 0¢No 100¢
100¢
N/A
$5,403
N/A
N/A
$3,975
Settled
No
kalshi

76° to 77°

0%
4%
Yes 0¢No 100¢
100¢
N/A
$4,044
N/A
N/A
$3,132
Settled
No
kalshi

74° to 75°

0%
1%
Yes 0¢No 100¢
100¢
N/A
$1,501
N/A
N/A
$1,195
Settled
No
kalshi

73° or below

0%
1%
Yes 0¢No 100¢
100¢
N/A
$881
N/A
N/A
$742
Settled
No
Total markets: 6

Description

This event tracks whether Boston will experience specific temperature ranges on September 18, 2026. Outcomes depend on the exact peak temperature recorded at a designated weather station, with different markets covering various temperature brackets.

Kalshi

All markets resolve based on the maximum temperature recorded at Boston's official weather station (CLIBOS) on September 18, 2026, as reported by The Weather Company. Each market corresponds to a specific temperature range: 73°F or below, 74-75°F, 76-77°F, 78-79°F, 80-81°F, or above 81°F. The Weather Company serves as the sole source for official data, though users may reference other services for guidance. Preliminary data may contain rounding or conversion discrepancies, requiring caution in interpretation. If the Exchange identifies a material error in the initial data publication, it may delay resolution until a corrected version is released or until the expiration date, whichever comes first. Should no valid data remain available by the expiration date, all markets resolve at the last fair price determined by the Exchange. The 'Final' status on The Weather Company's platform is informational and does not guarantee error-free data.