Frost dates
Frost dates in Washington
Typical last spring frost and first fall frost for 154 weather stations across Washington, from NOAA’s 1991–2020 climate normals.
Last spring frost
Mar 24 – May 14
Typical across Washington (middle: Apr 22)
First fall frost
Sep 26 – Nov 14
Typical across Washington (middle: Oct 20)
Your own yard can differ by weeks from the nearest town. Get frost dates for your exact spot →
By town
| Station | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Aberdeen | Mar 29 | Nov 15 | 231 |
| Aberdeen 20 NNE | Apr 15 | Nov 2 | 201 |
| Anacortes | Mar 8 | Nov 20 | 257 |
| Arlington | Apr 22 | Oct 19 | 180 |
| Baring | Apr 14 | Oct 29 | 198 |
| Battle Ground | Apr 26 | Oct 16 | 173 |
| Bellingham 3 SSW | Apr 1 | Nov 2 | 215 |
| Bellingham International Airport | Mar 31 | Oct 30 | 213 |
| Bickleton | May 16 | Oct 9 | 146 |
| Blaine | Mar 31 | Nov 4 | 218 |
| Boundary Dam | May 4 | Oct 4 | 153 |
| Bremerton | Mar 29 | Nov 14 | 230 |
| Buckley 1 NE | Apr 7 | Oct 30 | 206 |
| Carson Fish Hatchery | May 2 | Oct 9 | 160 |
| Cedar Lake | Apr 23 | Nov 1 | 192 |
| Centralia | Apr 22 | Oct 27 | 188 |
| Chelan | Apr 17 | Oct 22 | 188 |
| Chewelah | May 16 | Sep 15 | 122 |
| Chief Joseph Dam | Apr 26 | Oct 11 | 168 |
| Cle Elum | May 13 | Sep 25 | 135 |
| Clearbrook | Apr 18 | Oct 18 | 183 |
| Clearwater | Apr 29 | Oct 17 | 171 |
| Colville | May 2 | Oct 2 | 153 |
| Concrete Ppl Fish Station | Mar 28 | Nov 14 | 231 |
| Connell 1 W | Apr 30 | Oct 12 | 165 |
| Cougar 6 E | Apr 1 | Nov 18 | 231 |
| Coulee Dam 1 SW | Apr 22 | Oct 21 | 182 |
| Coupeville 1 S | Mar 17 | Nov 11 | 239 |
| Cushman Powerhouse #2 | Mar 24 | Nov 15 | 236 |
| Darrington 21 NNE | Apr 16 | Oct 25 | 192 |
| Darrington RS | Apr 16 | Oct 23 | 190 |
| Davenport | Jun 6 | Sep 11 | 97 |
| Dayton 1 WSW | Apr 28 | Oct 13 | 168 |
| Deer Park Airport | May 22 | Sep 14 | 115 |
| Diablo Dam | Apr 10 | Nov 1 | 205 |
| Easton | May 9 | Oct 6 | 150 |
| Ellensburg | May 8 | Oct 2 | 147 |
| Ellensburg Bowers Field | Apr 28 | Oct 7 | 162 |
| Elma | May 1 | Oct 14 | 166 |
| Eltopia 8 WSW | Apr 21 | Oct 22 | 184 |
| Elwha RS | Apr 9 | Nov 3 | 208 |
| Entiat Fish Hatchery | Apr 5 | Oct 24 | 202 |
| Ephrata Municipal Airport | Apr 22 | Oct 17 | 178 |
| Everett | Mar 24 | Nov 2 | 223 |
| Everett Snohomish Airport | Mar 9 | Nov 17 | 253 |
| Forks 1 E | Apr 26 | Oct 25 | 182 |
| Friday Harbor Airport | Mar 26 | Nov 10 | 229 |
| Glenoma | Apr 24 | Oct 15 | 174 |
| Goldendale | May 19 | Sep 25 | 129 |
| Grayland | Mar 29 | Nov 7 | 223 |
| Grays Rvr Hatchery | Apr 27 | Oct 22 | 178 |
| Harrington | May 31 | Sep 12 | 104 |
| Hartline | May 2 | Oct 12 | 163 |
| Hatton 9 SE | Apr 25 | Oct 15 | 173 |
| Holden Village | May 25 | Sep 19 | 117 |
| Hoquiam Bowerman Airport | Mar 30 | Nov 14 | 229 |
| Humptulips Salmon Hatchery | Apr 26 | Oct 22 | 179 |
| Ice Harbor Dam | Apr 7 | Oct 22 | 198 |
| Kennewick | Mar 28 | Oct 30 | 216 |
| Kent | Mar 20 | Nov 10 | 235 |
| Lacrosse | May 13 | Sep 26 | 136 |
| Landsburg | Apr 20 | Oct 25 | 188 |
| Leavenworth 3 S | May 10 | Sep 30 | 143 |
| Lind 3 NE | May 7 | Oct 4 | 150 |
| Long Beach Experiment Station | Apr 6 | Oct 26 | 203 |
| Longmire Rainier Nps | May 22 | Oct 3 | 134 |
| Longview | Apr 8 | Nov 5 | 211 |
| Matlock 8 S | Apr 23 | Oct 20 | 180 |
| Mayfield Pwr Plt | Apr 7 | Nov 13 | 220 |
| Mazama | May 9 | Sep 29 | 143 |
| Mcmillin Reservoir | Apr 11 | Oct 30 | 202 |
| Mcnary Dam | Mar 27 | Nov 4 | 222 |
| Methow 2 S | Apr 21 | Oct 15 | 177 |
| Monroe | Apr 17 | Oct 23 | 189 |
| Moses Lake Grant County Airport | Apr 27 | Oct 8 | 164 |
| Mount Adams RS | May 18 | Sep 25 | 130 |
| Mount Vernon 3 WNW | Mar 24 | Nov 3 | 224 |
| Moxee City 10 E | May 4 | Oct 10 | 159 |
| Mud Mountain Dam | Apr 18 | Oct 31 | 196 |
| Naselle 2 ENE | Apr 24 | Oct 20 | 179 |
| Newhalem | Apr 2 | Nov 14 | 226 |
| Newport | May 12 | Sep 21 | 132 |
| Northport | May 8 | Oct 1 | 146 |
| Odessa | May 14 | Sep 26 | 135 |
| Olga 2 SE | Feb 26 | Nov 29 | 276 |
| Olympia Airport | Apr 29 | Oct 14 | 168 |
| Omak Airport | Apr 30 | Oct 7 | 160 |
| Packwood | Apr 30 | Oct 8 | 161 |
| Palmer 3 ESE | Apr 3 | Nov 11 | 222 |
| Pasco Tri Cities Airport | Apr 27 | Oct 11 | 167 |
| Plain | May 22 | Sep 22 | 123 |
| Pomeroy | May 2 | Oct 4 | 155 |
| Port Angeles | Mar 12 | Nov 19 | 252 |
| Port Angeles International Airport | Apr 8 | Oct 31 | 206 |
| Port Townsend | Mar 1 | Nov 28 | 272 |
| Priest Rapids Dam | Mar 24 | Nov 4 | 225 |
| Prosser | Apr 14 | Oct 22 | 191 |
| Pullman 2 NW | May 6 | Sep 29 | 146 |
| Pullman Moscow Regional Airport | Apr 29 | Oct 2 | 156 |
| Quilcene 2 SW | Apr 11 | Oct 28 | 200 |
| Quillayute State Airport | Apr 20 | Oct 26 | 189 |
| Quinault 4 NE | Apr 7 | Nov 10 | 217 |
| Quincy | Apr 21 | Oct 16 | 178 |
| Raymond 2 S | Apr 26 | Oct 17 | 174 |
| Renton Municipal Airport | Mar 13 | Nov 16 | 248 |
| Republic | May 30 | Sep 10 | 103 |
| Richland | Apr 6 | Oct 24 | 201 |
| Ritzville 1 SSE | May 7 | Oct 10 | 156 |
| Rosalia | May 7 | Sep 28 | 144 |
| Ross Dam | Apr 8 | Nov 10 | 216 |
| Sagemoor | Apr 30 | Oct 13 | 166 |
| Satus Pass 2 SSW | Jun 2 | Oct 1 | 121 |
| Seattle Boeing Field | Mar 13 | Nov 17 | 249 |
| Seattle Sand Pt Wsfo | Mar 8 | Nov 23 | 260 |
| Seattle Tacoma International Airport | Mar 2 | Nov 23 | 266 |
| Sedro-Woolley | Mar 27 | Nov 6 | 224 |
| Selah 2 NE | May 5 | Oct 4 | 152 |
| Sequim 2 E | Apr 21 | Oct 20 | 182 |
| Shelton Sanderson Field | Apr 27 | Oct 16 | 172 |
| Skamania Fish Hatchery | Apr 29 | Oct 22 | 176 |
| Smyrna | Apr 23 | Oct 12 | 172 |
| Snoqualmie Falls | Mar 30 | Nov 7 | 222 |
| Snowden | May 12 | Oct 11 | 152 |
| Spokane | May 10 | Sep 26 | 139 |
| Spokane 17 SSW | May 30 | Sep 4 | 97 |
| Spokane Felts Field | Apr 26 | Oct 15 | 172 |
| Spokane International Airport | Apr 26 | Oct 12 | 169 |
| St John | Apr 29 | Oct 4 | 158 |
| Stampede Pass | May 14 | Oct 17 | 156 |
| Startup 1 E | Apr 15 | Oct 25 | 193 |
| Stehekin 4 NW | Apr 27 | Oct 17 | 173 |
| Sunnyside | May 1 | Oct 6 | 158 |
| Sunnyside #2 | Apr 30 | Oct 8 | 161 |
| Tacoma #1 | Mar 8 | Nov 14 | 251 |
| Tacoma Narrows Airport | Mar 11 | Nov 21 | 255 |
| The Dalles Municipal Airport | Apr 11 | Oct 26 | 198 |
| Toledo Faa Airport | Apr 5 | Oct 25 | 203 |
| Tolt S Fk Reservoir | Apr 13 | Nov 10 | 211 |
| Tonasket 11 NE | May 6 | Oct 6 | 153 |
| Tonasket 4 NNE | Apr 26 | Oct 10 | 167 |
| Upper Baker Dam | Apr 24 | Oct 29 | 188 |
| Vancouver 4 NNE | Apr 26 | Oct 18 | 175 |
| Vancouver Pearson Airport | Mar 29 | Nov 9 | 225 |
| Walla Walla Regional Airport | Mar 27 | Oct 31 | 218 |
| Wapato | Apr 21 | Oct 15 | 177 |
| Waterville | May 14 | Oct 1 | 140 |
| Wenatchee | Apr 4 | Oct 28 | 207 |
| Wenatchee Pangborn Airport | Apr 8 | Oct 24 | 199 |
| Whidbey Island NAS | Mar 13 | Nov 14 | 246 |
| Whitman Mission | May 2 | Oct 1 | 152 |
| Wilbur | Jun 1 | Sep 22 | 113 |
| Winthrop 1 WSW | May 15 | Sep 22 | 130 |
| Yakima #2 | Apr 8 | Oct 23 | 198 |
| Yakima Air Terminal | May 8 | Oct 4 | 149 |
Each date is the median: in half of years the frost comes earlier, in half later. Frost here means a low of 32°F or colder at the station. Low spots and valleys often frost a week or two earlier than these dates; hillsides and city centers later.
Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020. The Field almanac also shows how often frost comes early or late, and a reanalysis reading for your exact location.