Washington Frost Dates

Washington has 156 NOAA weather stations with freeze records in the 1991–2020 climate normals. The typical last spring frost ranges from February 26 at Olga 2 Se to June 6 at Davenport; at half the stations it has come by April 22. The first fall frost typically arrives between September 4 at Spokane 17 Ssw and November 29 at Olga 2 Se, with a median of October 20.

The growing season between the typical frosts runs from 94 days at Davenport to 276 days at Olga 2 Se; 180 days at the median station.

At 2 stations, a freeze is possible in any month.

Every station in Washington

Typical dates have a 50% chance of a frost after them in spring, and before them in fall; safer dates, 10%. A garden can differ from its nearest station, especially in a valley or on a hillside: see why your garden may differ.

Washington: freeze (32 °F) dates by NOAA station, 1991–2020 normals
Station	Elevation	Last frost	Safer	First frost	Safer	Season (days)
Aberdeen 20nne	435 ft	Apr 15	May 8	Nov 2	Oct 17	200
Aberdeen	10 ft	Mar 29	Apr 20	Nov 15	Oct 27	234
Anacortes	20 ft	Mar 8	Mar 28	Nov 20	Nov 1	255
Arlington	100 ft	Apr 22	May 6	Oct 19	Oct 3	181
Baring	770 ft	Apr 14	May 4	Oct 29	Oct 12	197
Battle Ground	284 ft	Apr 26	May 12	Oct 16	Sep 29	174
Bellingham 3 Ssw	15 ft	Apr 1	Apr 24	Nov 2	Oct 15	216
Bellingham Intl Ap	149 ft	Mar 31	Apr 18	Oct 30	Oct 12	211
Bickleton	3,015 ft	May 16	Jun 10	Oct 9	Sep 26	144
Blaine	60 ft	Mar 31	Apr 22	Nov 4	Oct 18	219
Boundary Dam	1,837 ft	May 4	May 18	Oct 4	Sep 21	153
Bremerton	110 ft	Mar 29	Apr 24	Nov 14	Oct 26	227
Buckley 1 Ne	685 ft	Apr 7	Apr 27	Oct 30	Oct 8	204
Carson Fish Hatchery	1,134 ft	May 2	May 20	Oct 9	Sep 22	161
Cedar Lake	1,560 ft	Apr 23	May 13	Nov 1	Oct 17	193
Centralia	185 ft	Apr 22	May 10	Oct 27	Oct 7	188
Chelan	1,194 ft	Apr 17	Apr 30	Oct 22	Oct 9	187
Chewelah	1,670 ft	May 16	Jun 7	Sep 15	Sep 1	120
Chief Joseph Dam	834 ft	Apr 26	May 13	Oct 11	Sep 30	167
Cle Elum	1,900 ft	May 13	Jun 1	Sep 25	Sep 11	132
Clearbrook	64 ft	Apr 18	May 5	Oct 18	Sep 28	185
Clearwater	80 ft	Apr 29	May 16	Oct 17	Sep 27	171
Colville	1,554 ft	May 2	May 17	Oct 2	Sep 19	153
Concrete Ppl Fish Stn	195 ft	Mar 28	Apr 19	Nov 14	Oct 23	229
Connell 1 W	1,020 ft	Apr 30	May 15	Oct 12	Sep 29	165
Cougar 6 E	659 ft	Apr 1	May 2	Nov 18	Oct 29	227
Coulee Dam 1 Sw	1,719 ft	Apr 22	May 7	Oct 21	Oct 6	180
Coupeville 1 S	50 ft	Mar 17	Apr 3	Nov 11	Oct 21	237
Cushman Powerhouse #2	21 ft	Mar 24	Apr 17	Nov 15	Oct 25	235
Darrington 21 Nne	407 ft	Apr 16	May 6	Oct 25	Oct 10	192
Darrington Rs	550 ft	Apr 16	May 5	Oct 23	Oct 6	190
Davenport	2,369 ft	Jun 6	Jul 5	Sep 11	Aug 26	94
Dayton 1 Wsw	1,557 ft	Apr 28	May 14	Oct 13	Sep 30	168
Deer Park Ap	2,191 ft	May 22	Jun 15	Sep 14	Aug 28	112
Diablo Dam	891 ft	Apr 10	May 1	Nov 1	Oct 19	203
Easton	2,170 ft	May 9	May 26	Oct 6	Sep 24	151
Ellensburg Bowers Fld	1,766 ft	Apr 28	May 12	Oct 7	Sep 26	163
Ellensburg	1,480 ft	May 8	May 25	Oct 2	Sep 20	146
Elma	70 ft	May 1	May 19	Oct 14	Sep 29	169
Eltopia 8 Wsw	700 ft	Apr 21	May 6	Oct 22	Oct 7	182
Elwha Rs	360 ft	Apr 9	Apr 29	Nov 3	Oct 19	209
Entiat Fish Hatchery	1,027 ft	Apr 5	May 2	Oct 24	Sep 29	200
Ephrata Muni Ap	1,252 ft	Apr 22	May 6	Oct 17	Oct 3	175
Everett Snohomish Ap	606 ft	Mar 9	Mar 29	Nov 17	Oct 31	250
Everett	60 ft	Mar 24	Apr 11	Nov 2	Oct 16	223
Forks 1 E	350 ft	Apr 26	May 10	Oct 25	Oct 6	182
Friday Harbor Ap	109 ft	Mar 26	Apr 21	Nov 10	Oct 21	230
Glenoma	840 ft	Apr 24	May 12	Oct 15	Sep 24	176
Glenwood #2	1,902 ft	A freeze is possible in any month
Goldendale	1,640 ft	May 19	Jun 9	Sep 25	Sep 8	126
Grayland	10 ft	Mar 29	Apr 24	Nov 7	Oct 19	224
Grays Rvr Hatchery	100 ft	Apr 27	May 18	Oct 22	Oct 3	178
Harrington	2,159 ft	May 31	Jun 28	Sep 12	Aug 23	101
Hartline	1,906 ft	May 2	May 22	Oct 12	Sep 27	162
Hatton 9 Se	1,505 ft	Apr 25	May 11	Oct 15	Oct 2	173
Holden Village	3,218 ft	May 25	Jun 12	Sep 19	Aug 29	114
Hoquiam Bowerman Ap	12 ft	Mar 30	Apr 25	Nov 14	Oct 22	228
Humptulips Salmon Hatchery	140 ft	Apr 26	May 15	Oct 22	Oct 3	180
Ice Harbor Dam	368 ft	Apr 7	Apr 30	Oct 22	Oct 6	199
Kennewick	390 ft	Mar 28	Apr 10	Oct 30	Oct 18	216
Kent	30 ft	Mar 20	Apr 8	Nov 10	Oct 26	233
Lacrosse	1,476 ft	May 13	Jun 1	Sep 26	Sep 8	133
Landsburg	535 ft	Apr 20	May 10	Oct 25	Oct 5	187
Leavenworth 3 S	1,128 ft	May 10	May 28	Sep 30	Sep 18	142
Lind 3 Ne	1,630 ft	May 7	May 21	Oct 4	Sep 22	150
Long Beach Exp Stn	25 ft	Apr 6	Apr 28	Oct 26	Oct 4	200
Longmire Rainier Nps	2,762 ft	May 22	Jun 9	Oct 3	Sep 16	134
Longview	12 ft	Apr 8	May 2	Nov 5	Oct 17	210
Matlock 8 S	110 ft	Apr 23	May 7	Oct 20	Oct 1	183
Mayfield Pwr Plt	280 ft	Apr 7	May 8	Nov 13	Oct 24	215
Mazama	2,141 ft	May 9	May 24	Sep 29	Sep 15	142
Mcmillin Rsvr	579 ft	Apr 11	Apr 29	Oct 30	Oct 13	202
Mcnary Dam	361 ft	Mar 27	Apr 14	Nov 4	Oct 21	221
Methow 2 S	1,135 ft	Apr 21	May 10	Oct 15	Oct 3	177
Monroe	120 ft	Apr 17	May 7	Oct 23	Oct 7	188
Moses Lake Grant Co Ap	1,196 ft	Apr 27	May 11	Oct 8	Sep 29	165
Moxee City 10 E	1,550 ft	May 4	May 23	Oct 10	Sep 26	155
Mt Adams Rs	1,950 ft	May 18	Jun 12	Sep 25	Sep 4	125
Mt Vernon 3 Wnw	14 ft	Mar 24	Apr 14	Nov 3	Oct 12	224
Mud Mtn Dam	1,308 ft	Apr 18	May 10	Oct 31	Oct 8	196
Naselle 2 Ene	50 ft	Apr 24	May 11	Oct 20	Oct 1	179
Newhalem	525 ft	Apr 2	Apr 27	Nov 14	Oct 28	224
Newport	2,162 ft	May 12	May 29	Sep 21	Sep 5	130
Northport	1,497 ft	May 8	May 26	Oct 1	Sep 15	143
Odessa	1,543 ft	May 14	May 31	Sep 26	Sep 10	135
Olga 2 Se	80 ft	Feb 26	Mar 23	Nov 29	Nov 10	276
Olympia Ap	188 ft	Apr 29	May 15	Oct 14	Sep 28	169
Omak Ap	1,296 ft	Apr 30	May 15	Oct 7	Sep 23	160
Packwood	1,060 ft	Apr 30	May 17	Oct 8	Sep 21	162
Palmer 3 Ese	920 ft	Apr 3	May 2	Nov 11	Oct 25	219
Pasco Tri Cities Ap	407 ft	Apr 27	May 10	Oct 11	Sep 28	168
Plain	1,936 ft	May 22	Jun 13	Sep 22	Sep 7	121
Pomeroy	1,934 ft	May 2	May 19	Oct 4	Sep 17	155
Port Angeles Intl Ap	288 ft	Apr 8	May 1	Oct 31	Oct 13	204
Port Angeles	90 ft	Mar 12	Apr 1	Nov 19	Nov 1	252
Port Townsend	100 ft	Mar 1	Mar 23	Nov 28	Nov 9	274
Priest Rapids Dam	428 ft	Mar 24	Apr 7	Nov 4	Oct 23	222
Prosser	830 ft	Apr 14	May 7	Oct 22	Oct 5	189
Pullman 2 Nw	2,515 ft	May 6	May 25	Sep 29	Sep 9	143
Pullman Moscow Rgnl Ap	2,551 ft	Apr 29	May 14	Oct 2	Sep 17	159
Quilcene 2 Sw	123 ft	Apr 11	May 1	Oct 28	Oct 13	199
Quillayute State Ap	185 ft	Apr 20	May 10	Oct 26	Oct 2	190
Quinault 4 Ne	286 ft	Apr 7	May 6	Nov 10	Oct 23	214
Quincy	1,286 ft	Apr 21	May 5	Oct 16	Oct 4	178
Rainier Paradise Rs	5,427 ft	A freeze is possible in any month
Raymond 2 S	30 ft	Apr 26	May 12	Oct 17	Oct 1	177
Renton Muni Ap	29 ft	Mar 13	Mar 31	Nov 16	Oct 29	248
Republic	2,555 ft	May 30	Jun 17	Sep 10	Aug 28	102
Richland	373 ft	Apr 6	Apr 24	Oct 24	Oct 10	200
Ritzville 1 Sse	1,864 ft	May 7	May 27	Oct 10	Sep 27	153
Rosalia	2,420 ft	May 7	May 25	Sep 28	Sep 11	144
Ross Dam	1,236 ft	Apr 8	Apr 30	Nov 10	Oct 26	214
Sagemoor	595 ft	Apr 30	May 16	Oct 13	Sep 29	166
Satus Pass 2 Ssw	2,585 ft	Jun 2	Jun 22	Oct 1	Sep 11	119
Seattle Boeing Fld	20 ft	Mar 13	Apr 1	Nov 17	Nov 1	247
Seattle Sand Pt Wsfo	60 ft	Mar 8	Mar 29	Nov 23	Nov 4	259
Seattle Tacoma Intl Ap	370 ft	Mar 2	Mar 23	Nov 23	Nov 6	266
Sedro-Woolley	60 ft	Mar 27	Apr 17	Nov 6	Oct 15	224
Selah 2 Ne	1,120 ft	May 5	May 23	Oct 4	Sep 23	149
Sequim 2 E	50 ft	Apr 21	May 7	Oct 20	Oct 3	181
Shelton Sanderson Fld	271 ft	Apr 27	May 12	Oct 16	Oct 1	175
Skamania Fish Hatchery	435 ft	Apr 29	May 15	Oct 22	Sep 27	177
Smyrna	560 ft	Apr 23	May 7	Oct 12	Oct 1	172
Snoqualmie Falls	440 ft	Mar 30	Apr 21	Nov 7	Oct 22	223
Snowden	2,415 ft	May 12	Jun 7	Oct 11	Sep 24	149
Spokane 17 Ssw	2,267 ft	May 30	Jul 13	Sep 4	Aug 21	94
Spokane Felts Fld	1,953 ft	Apr 26	May 10	Oct 15	Sep 30	170
Spokane Intl Ap	2,353 ft	Apr 26	May 10	Oct 12	Sep 29	168
Spokane Wfo	2,392 ft	May 10	May 30	Sep 26	Sep 11	137
St John	1,952 ft	Apr 29	May 15	Oct 4	Sep 19	161
Stampede Pass	3,959 ft	May 14	Jun 5	Oct 17	Oct 1	154
Startup 1 E	170 ft	Apr 15	May 7	Oct 25	Oct 5	192
Stehekin 4 Nw	1,257 ft	Apr 27	May 12	Oct 17	Oct 5	173
Sunnyside #2	805 ft	Apr 30	May 13	Oct 8	Sep 26	160
Sunnyside	747 ft	May 1	May 18	Oct 6	Sep 25	157
Tacoma #1	25 ft	Mar 8	Mar 31	Nov 14	Oct 30	250
Tacoma Narrows Ap	292 ft	Mar 11	Apr 2	Nov 21	Nov 3	254
The Dalles Muni Ap	235 ft	Apr 11	Apr 28	Oct 26	Oct 9	197
Toledo Faa Ap	379 ft	Apr 5	May 4	Oct 25	Sep 24	196
Tolt S Fk Rsvr	2,000 ft	Apr 13	May 4	Nov 10	Oct 24	210
Tonasket 11ne	3,434 ft	May 6	May 25	Oct 6	Sep 24	151
Tonasket 4 Nne	960 ft	Apr 26	May 11	Oct 10	Sep 28	168
Upper Baker Dam	690 ft	Apr 24	May 9	Oct 29	Oct 12	190
Vancouver 4 Nne	210 ft	Apr 26	May 10	Oct 18	Oct 1	177
Vancouver Pearson Ap	30 ft	Mar 29	Apr 18	Nov 9	Oct 22	223
Walla Walla Rgnl Ap	1,166 ft	Mar 27	Apr 22	Oct 31	Oct 15	219
Wapato	841 ft	Apr 21	May 7	Oct 15	Oct 4	176
Waterville	2,664 ft	May 14	Jun 4	Oct 1	Sep 18	140
Wenatchee Pangborn Ap	1,229 ft	Apr 8	Apr 23	Oct 24	Oct 12	200
Wenatchee	626 ft	Apr 4	Apr 19	Oct 28	Oct 17	208
Whidbey Island Nas	47 ft	Mar 13	Apr 1	Nov 14	Oct 26	244
Whitman Mission	632 ft	May 2	May 18	Oct 1	Sep 14	151
Wilbur	2,262 ft	Jun 1	Jun 22	Sep 22	Sep 2	112
Winthrop 1 Wsw	1,749 ft	May 15	Jun 1	Sep 22	Sep 10	127
Yakima #2	1,142 ft	Apr 8	Apr 28	Oct 23	Oct 9	196
Yakima Air Terminal	1,064 ft	May 8	May 27	Oct 4	Sep 23	149

Plan your garden with these dates

Enter your ZIP code in the planner: it picks the nearest of these stations and dates every crop in your beds from its frosts. Free, in your browser.

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Questions

When is the last frost in Washington?

It depends on where you are. The typical last spring frost at Washington's NOAA stations ranges from February 26 to June 6, and half of them have had it by April 22. Enter your ZIP code above for the station nearest you.

When is the first frost in Washington?

Typically between September 4 and November 29, depending on the station; the median is October 20. Plan fall crops back from your own station's date.

What do "typical" and "safer" mean?

With the typical (50%) last-frost date, half of years still have a frost after it. With the safer (10%) date, only one year in ten does. In fall it's the other way around: the safer date is the earlier one.

Sources

NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020 (annual/seasonal, by station: freeze dates at 32 °F)

Washington Frost Dates

Every station in Washington

Plan your garden with these dates

Questions

Other states

Sources