Frost dates · Washington
Washington counties by frost timing.
Latest at top, earliest at bottom. In most states this matches the north-to-south gradient.
Sorted by spring frost
Latest → earliest.
Ferry County
Spring May 12·Fall Sep 24135-day season
Lincoln County
Spring May 9·Fall Oct 1145-day season
Pend Oreille County
Spring May 4·Fall Sep 28147-day season
Chelan County
Spring May 3·Fall Oct 4154-day season
Klickitat County
Spring May 1·Fall Oct 7159-day season
Stevens County
Spring Apr 30·Fall Sep 28151-day season
Adams County
Spring Apr 23·Fall Oct 17177-day season
Okanogan County
Spring Apr 14·Fall Oct 19188-day season
Garfield County
Spring Apr 11·Fall Oct 19191-day season
Kittitas County
Spring Apr 11·Fall Oct 20192-day season
Franklin County
Spring Apr 10·Fall Oct 24197-day season
Skamania County
Spring Apr 7·Fall Oct 30206-day season
Columbia County
Spring Apr 6·Fall Oct 25202-day season
Grant County
Spring Apr 6·Fall Oct 27204-day season
Thurston County
Spring Apr 5·Fall Nov 1210-day season
Whitman County
Spring Apr 5·Fall Oct 20198-day season
Spokane County
Spring Apr 4·Fall Oct 27206-day season
Clark County
Spring Mar 29·Fall Nov 5221-day season
Douglas County
Spring Mar 29·Fall Nov 4220-day season
Whatcom County
Spring Mar 28·Fall Nov 17234-day season
Pacific County
Spring Mar 27·Fall Nov 7225-day season
Wahkiakum County
Spring Mar 25·Fall Nov 12232-day season
Benton County
Spring Mar 23·Fall Nov 2224-day season
Snohomish County
Spring Mar 18·Fall Nov 12239-day season
Pierce County
Spring Mar 16·Fall Nov 14243-day season
Yakima County
Spring Mar 16·Fall Nov 3232-day season
Asotin County
Spring Mar 15·Fall Nov 8238-day season
Cowlitz County
Spring Mar 6·Fall Nov 24263-day season
Lewis County
Spring Mar 6·Fall Dec 1270-day season
Clallam County
Spring Mar 4·Fall Nov 24265-day season
Jefferson County
Spring Mar 4·Fall Nov 24265-day season
Walla Walla County
Spring Mar 4·Fall Nov 14255-day season
King County
Spring Feb 27·Fall Nov 29275-day season
Kitsap County
Spring Feb 27·Fall Nov 30276-day season
Skagit County
Spring Feb 25·Fall Dec 2280-day season
San Juan County
Spring Feb 22·Fall Dec 1282-day season
Island County
Spring Feb 21·Fall Nov 28280-day season
Mason County
Spring Feb 20·Fall Dec 7290-day season
Grays Harbor County
Spring Feb 18·Fall Dec 6291-day season
Alphabetical · A to Z
- Adams County
- Asotin County
- Benton County
- Chelan County
- Clallam County
- Clark County
- Columbia County
- Cowlitz County
- Douglas County
- Ferry County
- Franklin County
- Garfield County
- Grant County
- Grays Harbor County
- Island County
- Jefferson County
- King County
- Kitsap County
- Kittitas County
- Klickitat County
- Lewis County
- Lincoln County
- Mason County
- Okanogan County
- Pacific County
- Pend Oreille County
- Pierce County
- San Juan County
- Skagit County
- Skamania County
- Snohomish County
- Spokane County
- Stevens County
- Thurston County
- Wahkiakum County
- Walla Walla County
- Whatcom County
- Whitman County
- Yakima County