TOTAL VOLUME:
$134.2b
24H VOL:
$134,145,987
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,441,166,947
406,422
Markets across
30,383
events
MATCHED EVENTS:
2,688
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 19, 1:00 AM EST
Kalshi
This market tracks the highest temperature recorded in Boston on July 18, 2026. The outcome will be determined by the official National Weather Service Climatological Report (Daily) for Boston Logan Airport, which provides the authoritative temperature measurement for the region.
Resolution is based on the maximum temperature recorded at Boston on July 18, 2026, according to the National Weather Service's Climatological Report (Daily) for Boston (Logan Airport), MA. The official data source is accessed via the NWS website under the "Observed Weather" tab. Temperature ranges are divided into six outcomes: 79°F or below, 80-81°F, 82-83°F, 84-85°F, 86-87°F, and 88°F or above. Traders should note that preliminary NWS data may be subject to rounding and conversion nuances, and the final official report should be used for resolution rather than preliminary estimates or third-party weather services.