TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
$
The minimum temperature in Seattle on May 31, 2026, will be recorded according to the National Weather Service's daily climatological data. This event covers the full range of possible temperature outcomes.
The market resolves on Jun 1, 2026, after May 31, 2026 has concluded and the actual lowest temperature in Seattle for that day is recorded. Resolution depends on official temperature data from a designated weather station or source, which is verified and used to determine which outcome contracts are correct. Once the final temperature is confirmed, winning shares are paid out at full value and losing shares expire worthless. The exact data source and measurement methodology are specified in the market's terms at launch.
Several factors could shift odds for Seattle's lowest temperature on May 31, 2026. Updated seasonal climate forecasts from NOAA or other meteorological agencies may indicate warmer or cooler-than-normal conditions for late May. Major atmospheric patterns, such as high-pressure systems or cold fronts developing weeks before the date, could influence trader expectations. Long-range model consensus and historical analogs for similar weather patterns may also drive trading activity. As May 2026 approaches, short-range forecasts will become increasingly precise, potentially causing sharp price movements as uncertainty narrows.