Settlement stations / KSEA

US · America/Los_Angeles

Kalshi and Polymarket Seattle temperature: settle on KSEA

KSEA is Seattle-Tacoma International, Seattle. Kalshi and Polymarket settle temperature contracts here. Below: the resolution source each venue names, when the station reports, and how long a reading takes to reach the public feed.

How it settles

VenueResolution sourceUnitBucketContracts
KalshiNWS Climatological Report (CLI), relayed by The Weather Company
Source code CLISEA. The daily climatological report is compiled from the full one-minute record, so it can print a high that the hourly reports never showed.		Fahrenheit2°Fhigh · low
KXHIGHTSEA, KXLOWTSEA
PolymarketNOAA station observations published by weather.gov
Source code KSEA. The observation table is the same hourly report stream shown here, so the running high tracks it directly.		Fahrenheit2°Fhigh · low
highest-temperature-in-seattle, lowest-temperature-in-seattle

Reporting and delay

Regular reports:53:53 past each hour, UTC — 1 regular report per hour.
Median delay3.5 minFrom the observation time in the report to the public NOAA feed. 29 reports, measured 2026-09-16.
90th percentile3.7 minOne report in ten is at least this late. Worth knowing before you trust a quiet hour.
Coordinates47.445, -122.314Local civil time: America/Los_Angeles

Questions

Which weather station settles Seattle temperature contracts?

Kalshi and Polymarket settle Seattle on KSEA, Seattle-Tacoma International.

What is the resolution source for Kalshi Seattle temperature?

Kalshi names NWS Climatological Report (CLI), relayed by The Weather Company. Contracts settle in Fahrenheit on 2-degree buckets. The daily climatological report is compiled from the full one-minute record, so it can print a high that the hourly reports never showed.

What is the resolution source for Polymarket Seattle temperature?

Polymarket names NOAA station observations published by weather.gov. Contracts settle in Fahrenheit on 2-degree buckets. The observation table is the same hourly report stream shown here, so the running high tracks it directly.

When does KSEA report?

:53 past each hour, UTC — 1 regular report per hour.

How long does a KSEA observation take to become public?

Measured over 26 hours on 2026-09-16, the median delay from the observation time in the report to its arrival on the public NOAA feed was 3.5 min, with a 90th percentile of 3.7 min across 29 reports. This moves with upstream conditions and is not a service level.

One email when plans open. No newsletter, and you can reply to unsubscribe.
WeatherTick tracks 67 settlement stations and publishes each day's running high and low already converted into the unit and bucket the contract settles in. Open the terminal for Seattle, or see every settlement station. Settlement always follows the resolution source named by the venue; the figures here are computed from the public feed and are not a settlement source.