TOTAL VOLUME:

$134b

24H VOL:

$107,351,958

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,416,970,024

400,720

Markets across

30,097

events

MATCHED EVENTS:

2,633

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Highest temperature in Boston on May 28, 2026?
kalshi

Highest temperature in Boston on May 28, 2026?

Volume:
$124,455

70° to 71°

 - Kalshi

70° to 71° - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved May 29, 2026

Closed: May 29, 1:00 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

70° to 71°

View
100%
Yes 100¢No 0¢
100¢
N/A
$47,468
N/A
N/A
$31,458
Settled
Yes
kalshi

68° to 69°

0%
Yes 0¢No 100¢
100¢
N/A
$23,321
N/A
N/A
$12,094
Settled
No
kalshi

72° to 73°

0%
Yes 0¢No 100¢
100¢
N/A
$20,218
N/A
N/A
$12,594
Settled
No
kalshi

74° to 75°

0%
Yes 0¢No 100¢
100¢
N/A
$12,070
N/A
N/A
$10,767
Settled
No
kalshi

76° or above

0%
Yes 0¢No 100¢
100¢
N/A
$10,998
N/A
N/A
$10,051
Settled
No
kalshi

67° or below

0%
Yes 0¢No 100¢
100¢
N/A
$10,379
N/A
N/A
$4,726
Settled
No
Total markets: 6

Intro

This market tracks whether Boston's maximum temperature will fall within the 70-71° Fahrenheit range on May 28, 2026. On Kalshi, the leading outcome carries a probability of 97.0%, while the 72-73° range outcome stands at 3.0%. Resolution will be determined by the National Weather Service's Climatological Report (Daily) for that date. Watch the actual temperature reading recorded by the National Weather Service on May 28, 2026, as it will directly determine which outcome resolves to Yes.

Frequently asked questions

The Highest temperature in Boston on May 28, 2026 dashboard on Kalshi tracks real-time odds and trading activity for this weather event. It displays the current probability that the maximum temperature will fall below 68 degrees Fahrenheit on that date, along with historical price movements and 24-hour trading volume of $106,491. The dashboard aggregates all active contracts related to this outcome, allowing traders to monitor how market sentiment evolves as May 28 approaches. Total group volume stands at $124,455, reflecting sustained interest in this Boston weather prediction.

The market resolves on May 29, 2026, after the maximum temperature for May 28, 2026 in Boston has been recorded. Resolution depends on the official high temperature reported for that day, which is compared against the 68-degree threshold specified in the contract. The outcome is binary: either the high temperature falls below 68 degrees, or it does not. Traders should monitor weather forecasts and actual conditions as the date approaches to inform their trading decisions before the market closes.

Several factors could shift odds for this Boston temperature event. Major weather pattern changes, such as the approach of a cold front or high-pressure system, would alter forecaster expectations and trader sentiment. Updated seasonal climate outlooks and atmospheric indices like the North Atlantic Oscillation may signal cooler or warmer conditions for late May. Real-time weather model runs issued in the days leading up to May 28 will provide increasingly precise forecasts, driving price adjustments. Additionally, any unusual climate anomalies or jet stream configurations could surprise the market and trigger significant trading volume.