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First and last freeze dates in Seattle (Sea-Tac Airport), WA

The first freeze of fall (a low of 32°F or colder) typically comes around Nov 13, and the last freeze of spring around Mar 8.

This fall so far (data through Oct 16, 2026): no 32°F freeze recorded yet at this station. Observed data, can lag a day or two.

Nov 13Median first fall freeze (≤32°F)

Mar 8Median last spring freeze (≤32°F)

250Median freeze-free days between

First and last freeze dates in Seattle (Sea-Tac Airport)

Threshold	Event	Median date	Typical range (10th–90th pct)	Earliest / latest	Years with one
32°F or colder (freeze)	First in fall	Nov 13	Oct 31 – Dec 9	Oct 28 (2001) / Dec 24 (1999)	100%
32°F or colder (freeze)	Last in spring	Mar 8	Feb 25 – Mar 29	–	100%
28°F or colder (hard freeze)	First in fall	Dec 3	Nov 22 – Dec 19	Nov 16 (2000) / Dec 26 (2021)	67%
28°F or colder (hard freeze)	Last in spring	Feb 14	Jan 11 – Mar 6	–	90%

Based on the station’s daily minimum temperature, 1995–2024. “Freeze” here means a daily low at or below the threshold, which is not the same as visible frost. Your yard can differ by several degrees and days from an airport weather station, so use these as planning odds, not guarantees.

The median stretch between the last spring freeze and the first fall freeze (the freeze-free season) was about 250 days.

Nearby weather stations

Source station: Seattle Tacoma Ap (USW00024233), elevation 369 ft. Data: NOAA NCEI GHCN-Daily. Computed by First Snow Dates; how we calculate this. Historical averages only; for a forecast see weather.gov.

Planning for winter? Heat pump vs gas furnace, propane and oil: heating cost in Washington (on our sister site PlugVsPump, from EIA prices).