First and last freeze/frost dates for Seattle, WA ,United StatesFirst and last freeze/frost dates for:
Detailed station data* follows:
Everett, WA (Snohomish county):
|Spring 32°||Apr 25||Apr 19||Apr 14||Apr 10||Apr 6||Apr 3||Mar 30||Mar 25||Mar 19|
|Spring 28°||Mar 21||Mar 13||Mar 8||Mar 3||Feb 27||Feb 22||Feb 18||Feb 12||Feb 5|
|Spring 24°||Feb 25||Feb 16||Feb 10||Feb 5||Jan 31||Jan 26||Jan 21||Jan 14||Jan 4|
|Fall 32°||Oct 7||Oct 13||Oct 18||Oct 22||Oct 26||Oct 29||Nov 1||Nov 6||Nov 13|
|Fall 28°||Oct 24||Nov 2||Nov 9||Nov 15||Nov 21||Nov 26||Dec 3||Dec 10||Dec 20|
|Fall 24°||Nov 9||Nov 21||Dec 2||Dec 9||Dec 17||Dec 24||Jan 2||Jan 12||Jan 27|
Quilcene 2 Sw, WA (Jefferson county):
|Spring 32°||May 6||May 1||Apr 27||Apr 23||Apr 20||Apr 17||Apr 14||Apr 10||Apr 4|
|Spring 28°||Apr 12||Apr 2||Mar 26||Mar 19||Mar 14||Mar 8||Mar 1||Feb 22||Feb 12|
|Spring 24°||Mar 6||Feb 25||Feb 18||Feb 12||Feb 7||Feb 2||Jan 27||Jan 20||Jan 9|
|Fall 32°||Oct 3||Oct 8||Oct 11||Oct 14||Oct 17||Oct 20||Oct 23||Oct 26||Oct 31|
|Fall 28°||Oct 22||Oct 30||Nov 4||Nov 9||Nov 14||Nov 19||Nov 24||Dec 1||Dec 9|
|Fall 24°||Nov 7||Nov 19||Nov 27||Dec 6||Dec 13||Dec 20||Dec 27||Jan 5||Jan 19|
Bremerton, WA (Kitsap county):
|Spring 32°||Apr 23||Apr 16||Apr 11||Apr 7||Apr 4||Mar 31||Mar 27||Mar 22||Mar 16|
|Spring 28°||Mar 17||Mar 8||Mar 1||Feb 23||Feb 17||Feb 12||Feb 6||Jan 30||Jan 21|
|Spring 24°||Feb 24||Feb 13||Feb 6||Jan 30||Jan 23||Jan 16||Jan 8||Dec 26|
|Fall 32°||Oct 29||Nov 3||Nov 7||Nov 11||Nov 15||Nov 18||Nov 22||Nov 26||Dec 3|
|Fall 28°||Nov 10||Nov 19||Nov 25||Dec 1||Dec 6||Dec 11||Dec 16||Dec 23||Dec 31|
|Fall 24°||Nov 25||Dec 7||Dec 16||Dec 24||Dec 31||Jan 8||Jan 17||Jan 31|
* This station data is available courtesy the National Climatic Data Center.
For each weather station, you will see a temperature along with tables of data organized into percentage columns. The percentage column tells you the probability that you will experience that row's temperature on or near that date. Here are two examples to help you determine your probable last frost and first freeze dates.
Example 1 (Last Frost). In the Spring 32° row, if you have "Apr 15" under the 50% column, that means you have a 50% chance of seeing frost on or before April 15th.
Example 2 (First Freeze). In the Fall 24° row, if you have "Dec 1" under the 90% column, that means you have a 90% chance of seeing 24 degrees on or after December 1st.
Empty cells indicate you have a less than 10% chance of ever seeing that temperature.