SowByZipgarden planner

Washington frost dates

Across 154 NOAA climate stations in Washington, the median last spring frost (32°F) ranges from Feb 26 at Olga 2 Se to Jun 6 at Davenport; the typical station sees its last frost around Apr 23 and its first fall frost around Oct 20.

“Median” dates have a 50% chance of a later spring frost or an earlier fall frost. “10% risk” dates are the safer choice for tender plants: only 1 year in 10 has frost beyond them. Source: NOAA NCEI 1991–2020 Climate Normals. Elevation matters: within a state, frost dates can differ by a month or more between valleys and hills.

StationElevationLast frost (median)Last frost (10% risk)First frost (median)First frost (10% risk)Growing season
Aberdeen10 ftMar 29Apr 20Nov 15Oct 27234 days
Aberdeen 20NNE435 ftApr 15May 8Nov 2Oct 17200 days
Anacortes20 ftMar 8Mar 28Nov 20Nov 1255 days
Arlington100 ftApr 22May 6Oct 19Oct 3181 days
Baring770 ftApr 14May 4Oct 29Oct 12197 days
Battle Ground284 ftApr 26May 12Oct 16Sep 29174 days
Bellingham 3 Ssw15 ftApr 1Apr 24Nov 2Oct 15216 days
Bellingham Intl AP149 ftMar 31Apr 18Oct 30Oct 12211 days
Bickleton3,015 ftMay 16Jun 10Oct 9Sep 26144 days
Blaine60 ftMar 31Apr 22Nov 4Oct 18219 days
Boundary Dam1,837 ftMay 4May 18Oct 4Sep 21153 days
Bremerton110 ftMar 29Apr 24Nov 14Oct 26227 days
Buckley 1 Ne685 ftApr 7Apr 27Oct 30Oct 8204 days
Carson Fish Hatchery1,134 ftMay 2May 20Oct 9Sep 22161 days
Cedar Lake1,560 ftApr 23May 13Nov 1Oct 17193 days
Centralia185 ftApr 22May 10Oct 27Oct 7188 days
Chelan1,194 ftApr 17Apr 30Oct 22Oct 9187 days
Chewelah1,670 ftMay 16Jun 7Sep 15Sep 1120 days
Chief Joseph Dam834 ftApr 26May 13Oct 11Sep 30167 days
Cle Elum1,900 ftMay 13Jun 1Sep 25Sep 11132 days
Clearbrook64 ftApr 18May 5Oct 18Sep 28185 days
Clearwater80 ftApr 29May 16Oct 17Sep 27171 days
Colville1,554 ftMay 2May 17Oct 2Sep 19153 days
Concrete Ppl Fish Stn195 ftMar 28Apr 19Nov 14Oct 23229 days
Connell 1 W1,020 ftApr 30May 15Oct 12Sep 29165 days
Cougar 6 E659 ftApr 1May 2Nov 18Oct 29227 days
Coulee Dam 1 Sw1,719 ftApr 22May 7Oct 21Oct 6180 days
Coupeville 1 S50 ftMar 17Apr 3Nov 11Oct 21237 days
Cushman Powerhouse #221 ftMar 24Apr 17Nov 15Oct 25235 days
Darrington 21 Nne407 ftApr 16May 6Oct 25Oct 10192 days
Darrington Rs550 ftApr 16May 5Oct 23Oct 6190 days
Davenport2,369 ftJun 6Jul 5Sep 11Aug 2694 days
Dayton 1 Wsw1,557 ftApr 28May 14Oct 13Sep 30168 days
Deer Park AP2,191 ftMay 22Jun 15Sep 14Aug 28112 days
Diablo Dam891 ftApr 10May 1Nov 1Oct 19203 days
Easton2,170 ftMay 9May 26Oct 6Sep 24151 days
Ellensburg1,480 ftMay 8May 25Oct 2Sep 20146 days
Ellensburg Bowers Fld1,766 ftApr 28May 12Oct 7Sep 26163 days
Elma70 ftMay 1May 19Oct 14Sep 29169 days
Eltopia 8 Wsw700 ftApr 21May 6Oct 22Oct 7182 days
Elwha Rs360 ftApr 9Apr 29Nov 3Oct 19209 days
Entiat Fish Hatchery1,027 ftApr 5May 2Oct 24Sep 29200 days
Ephrata Muni AP1,252 ftApr 22May 6Oct 17Oct 3175 days
Everett60 ftMar 24Apr 11Nov 2Oct 16223 days
Everett Snohomish AP606 ftMar 9Mar 29Nov 17Oct 31250 days
Forks 1 E350 ftApr 26May 10Oct 25Oct 6182 days
Friday Harbor AP109 ftMar 26Apr 21Nov 10Oct 21230 days
Glenoma840 ftApr 24May 12Oct 15Sep 24176 days
Goldendale1,640 ftMay 19Jun 9Sep 25Sep 8126 days
Grayland10 ftMar 29Apr 24Nov 7Oct 19224 days
Grays Rvr Hatchery100 ftApr 27May 18Oct 22Oct 3178 days
Harrington2,159 ftMay 31Jun 28Sep 12Aug 23101 days
Hartline1,906 ftMay 2May 22Oct 12Sep 27162 days
Hatton 9 Se1,505 ftApr 25May 11Oct 15Oct 2173 days
Holden Village3,218 ftMay 25Jun 12Sep 19Aug 29114 days
Hoquiam Bowerman AP12 ftMar 30Apr 25Nov 14Oct 22228 days
Humptulips Salmon Hatchery140 ftApr 26May 15Oct 22Oct 3180 days
Ice Harbor Dam368 ftApr 7Apr 30Oct 22Oct 6199 days
Kennewick390 ftMar 28Apr 10Oct 30Oct 18216 days
Kent30 ftMar 20Apr 8Nov 10Oct 26233 days
Lacrosse1,476 ftMay 13Jun 1Sep 26Sep 8133 days
Landsburg535 ftApr 20May 10Oct 25Oct 5187 days
Leavenworth 3 S1,128 ftMay 10May 28Sep 30Sep 18142 days
Lind 3 Ne1,630 ftMay 7May 21Oct 4Sep 22150 days
Long Beach Exp Stn25 ftApr 6Apr 28Oct 26Oct 4200 days
Longmire Rainier Nps2,762 ftMay 22Jun 9Oct 3Sep 16134 days
Longview12 ftApr 8May 2Nov 5Oct 17210 days
Matlock 8 S110 ftApr 23May 7Oct 20Oct 1183 days
Mayfield Pwr Plt280 ftApr 7May 8Nov 13Oct 24215 days
Mazama2,141 ftMay 9May 24Sep 29Sep 15142 days
Mcmillin Rsvr579 ftApr 11Apr 29Oct 30Oct 13202 days
Mcnary Dam361 ftMar 27Apr 14Nov 4Oct 21221 days
Methow 2 S1,135 ftApr 21May 10Oct 15Oct 3177 days
Monroe120 ftApr 17May 7Oct 23Oct 7188 days
Moses Lake Grant Co AP1,196 ftApr 27May 11Oct 8Sep 29165 days
Moxee City 10 E1,550 ftMay 4May 23Oct 10Sep 26155 days
Mt Adams Rs1,950 ftMay 18Jun 12Sep 25Sep 4125 days
Mt Vernon 3 Wnw14 ftMar 24Apr 14Nov 3Oct 12224 days
Mud Mtn Dam1,308 ftApr 18May 10Oct 31Oct 8196 days
Naselle 2 Ene50 ftApr 24May 11Oct 20Oct 1179 days
Newhalem525 ftApr 2Apr 27Nov 14Oct 28224 days
Newport2,162 ftMay 12May 29Sep 21Sep 5130 days
Northport1,497 ftMay 8May 26Oct 1Sep 15143 days
Odessa1,543 ftMay 14May 31Sep 26Sep 10135 days
Olga 2 Se80 ftFeb 26Mar 23Nov 29Nov 10276 days
Olympia AP188 ftApr 29May 15Oct 14Sep 28169 days
Omak AP1,296 ftApr 30May 15Oct 7Sep 23160 days
Packwood1,060 ftApr 30May 17Oct 8Sep 21162 days
Palmer 3 Ese920 ftApr 3May 2Nov 11Oct 25219 days
Pasco Tri Cities AP407 ftApr 27May 10Oct 11Sep 28168 days
Plain1,936 ftMay 22Jun 13Sep 22Sep 7121 days
Pomeroy1,934 ftMay 2May 19Oct 4Sep 17155 days
Port Angeles90 ftMar 12Apr 1Nov 19Nov 1252 days
Port Angeles Intl AP288 ftApr 8May 1Oct 31Oct 13204 days
Port Townsend100 ftMar 1Mar 23Nov 28Nov 9274 days
Priest Rapids Dam428 ftMar 24Apr 7Nov 4Oct 23222 days
Prosser830 ftApr 14May 7Oct 22Oct 5189 days
Pullman 2 Nw2,515 ftMay 6May 25Sep 29Sep 9143 days
Pullman Moscow Rgnl AP2,551 ftApr 29May 14Oct 2Sep 17159 days
Quilcene 2 Sw123 ftApr 11May 1Oct 28Oct 13199 days
Quillayute State AP185 ftApr 20May 10Oct 26Oct 2190 days
Quinault 4 Ne286 ftApr 7May 6Nov 10Oct 23214 days
Quincy1,286 ftApr 21May 5Oct 16Oct 4178 days
Raymond 2 S30 ftApr 26May 12Oct 17Oct 1177 days
Renton Muni AP29 ftMar 13Mar 31Nov 16Oct 29248 days
Republic2,555 ftMay 30Jun 17Sep 10Aug 28102 days
Richland373 ftApr 6Apr 24Oct 24Oct 10200 days
Ritzville 1 Sse1,864 ftMay 7May 27Oct 10Sep 27153 days
Rosalia2,420 ftMay 7May 25Sep 28Sep 11144 days
Ross Dam1,236 ftApr 8Apr 30Nov 10Oct 26214 days
Sagemoor595 ftApr 30May 16Oct 13Sep 29166 days
Satus Pass 2 Ssw2,585 ftJun 2Jun 22Oct 1Sep 11119 days
Seattle Boeing Fld20 ftMar 13Apr 1Nov 17Nov 1247 days
Seattle Sand Pt Wsfo60 ftMar 8Mar 29Nov 23Nov 4259 days
Seattle Tacoma Intl AP370 ftMar 2Mar 23Nov 23Nov 6266 days
Sedro-Woolley60 ftMar 27Apr 17Nov 6Oct 15224 days
Selah 2 Ne1,120 ftMay 5May 23Oct 4Sep 23149 days
Sequim 2 E50 ftApr 21May 7Oct 20Oct 3181 days
Shelton Sanderson Fld271 ftApr 27May 12Oct 16Oct 1175 days
Skamania Fish Hatchery435 ftApr 29May 15Oct 22Sep 27177 days
Smyrna560 ftApr 23May 7Oct 12Oct 1172 days
Snoqualmie Falls440 ftMar 30Apr 21Nov 7Oct 22223 days
Snowden2,415 ftMay 12Jun 7Oct 11Sep 24149 days
Spokane 17 Ssw2,267 ftMay 30Jul 13Sep 4Aug 2194 days
Spokane Felts Fld1,953 ftApr 26May 10Oct 15Sep 30170 days
Spokane Intl AP2,353 ftApr 26May 10Oct 12Sep 29168 days
Spokane Wfo2,392 ftMay 10May 30Sep 26Sep 11137 days
St John1,952 ftApr 29May 15Oct 4Sep 19161 days
Stampede Pass3,959 ftMay 14Jun 5Oct 17Oct 1154 days
Startup 1 E170 ftApr 15May 7Oct 25Oct 5192 days
Stehekin 4 Nw1,257 ftApr 27May 12Oct 17Oct 5173 days
Sunnyside747 ftMay 1May 18Oct 6Sep 25157 days
Sunnyside #2805 ftApr 30May 13Oct 8Sep 26160 days
Tacoma #125 ftMar 8Mar 31Nov 14Oct 30250 days
Tacoma Narrows AP292 ftMar 11Apr 2Nov 21Nov 3254 days
The Dalles Muni AP235 ftApr 11Apr 28Oct 26Oct 9197 days
Toledo FAA AP379 ftApr 5May 4Oct 25Sep 24196 days
Tolt S Fk Rsvr2,000 ftApr 13May 4Nov 10Oct 24210 days
Tonasket 11NE3,434 ftMay 6May 25Oct 6Sep 24151 days
Tonasket 4 Nne960 ftApr 26May 11Oct 10Sep 28168 days
Upper Baker Dam690 ftApr 24May 9Oct 29Oct 12190 days
Vancouver 4 Nne210 ftApr 26May 10Oct 18Oct 1177 days
Vancouver Pearson AP30 ftMar 29Apr 18Nov 9Oct 22223 days
Walla Walla Rgnl AP1,166 ftMar 27Apr 22Oct 31Oct 15219 days
Wapato841 ftApr 21May 7Oct 15Oct 4176 days
Waterville2,664 ftMay 14Jun 4Oct 1Sep 18140 days
Wenatchee626 ftApr 4Apr 19Oct 28Oct 17208 days
Wenatchee Pangborn AP1,229 ftApr 8Apr 23Oct 24Oct 12200 days
Whidbey Island Nas47 ftMar 13Apr 1Nov 14Oct 26244 days
Whitman Mission632 ftMay 2May 18Oct 1Sep 14151 days
Wilbur2,262 ftJun 1Jun 22Sep 22Sep 2112 days
Winthrop 1 Wsw1,749 ftMay 15Jun 1Sep 22Sep 10127 days
Yakima #21,142 ftApr 8Apr 28Oct 23Oct 9196 days
Yakima Air Terminal1,064 ftMay 8May 27Oct 4Sep 23149 days
Advertisement