Frost dates in Washington
Across 154 NOAA stations in Washington, the average last spring frost ranges from February 26 at Olga 2 Se to June 6 at Davenport.
| Aberdeen | March 29 | November 15 | 234 |
| Aberdeen 20Nne | April 15 | November 2 | 200 |
| Anacortes | March 8 | November 20 | 255 |
| Arlington | April 22 | October 19 | 181 |
| Baring | April 14 | October 29 | 197 |
| Battle Ground | April 26 | October 16 | 174 |
| Bellingham 3 Ssw | April 1 | November 2 | 216 |
| Bellingham Intl Airport | March 31 | October 30 | 211 |
| Bickleton | May 16 | October 9 | 144 |
| Blaine | March 31 | November 4 | 219 |
| Boundary Dam | May 4 | October 4 | 153 |
| Bremerton | March 29 | November 14 | 227 |
| Buckley 1 Ne | April 7 | October 30 | 204 |
| Carson Fish Hatchery | May 2 | October 9 | 161 |
| Cedar Lake | April 23 | November 1 | 193 |
| Centralia | April 22 | October 27 | 188 |
| Chelan | April 17 | October 22 | 187 |
| Chewelah | May 16 | September 15 | 120 |
| Chief Joseph Dam | April 26 | October 11 | 167 |
| Cle Elum | May 13 | September 25 | 132 |
| Clearbrook | April 18 | October 18 | 185 |
| Clearwater | April 29 | October 17 | 171 |
| Colville | May 2 | October 2 | 153 |
| Concrete Ppl Fish Stn | March 28 | November 14 | 229 |
| Connell 1 W | April 30 | October 12 | 165 |
| Cougar 6 E | April 1 | November 18 | 227 |
| Coulee Dam 1 Sw | April 22 | October 21 | 180 |
| Coupeville 1 S | March 17 | November 11 | 237 |
| Cushman Powerhouse #2 | March 24 | November 15 | 235 |
| Darrington 21 Nne | April 16 | October 25 | 192 |
| Darrington Rs | April 16 | October 23 | 190 |
| Davenport | June 6 | September 11 | 94 |
| Dayton 1 Wsw | April 28 | October 13 | 168 |
| Deer Park Airport | May 22 | September 14 | 112 |
| Diablo Dam | April 10 | November 1 | 203 |
| Easton | May 9 | October 6 | 151 |
| Ellensburg | May 8 | October 2 | 146 |
| Ellensburg Bowers Fld | April 28 | October 7 | 163 |
| Elma | May 1 | October 14 | 169 |
| Eltopia 8 Wsw | April 21 | October 22 | 182 |
| Elwha Rs | April 9 | November 3 | 209 |
| Entiat Fish Hatchery | April 5 | October 24 | 200 |
| Ephrata Muni Airport | April 22 | October 17 | 175 |
| Everett | March 24 | November 2 | 223 |
| Everett Snohomish Airport | March 9 | November 17 | 250 |
| Forks 1 E | April 26 | October 25 | 182 |
| Friday Harbor Airport | March 26 | November 10 | 230 |
| Glenoma | April 24 | October 15 | 176 |
| Goldendale | May 19 | September 25 | 126 |
| Grayland | March 29 | November 7 | 224 |
| Grays Rvr Hatchery | April 27 | October 22 | 178 |
| Harrington | May 31 | September 12 | 101 |
| Hartline | May 2 | October 12 | 162 |
| Hatton 9 Se | April 25 | October 15 | 173 |
| Holden Village | May 25 | September 19 | 114 |
| Hoquiam Bowerman Airport | March 30 | November 14 | 228 |
| Humptulips Salmon Hatchery | April 26 | October 22 | 180 |
| Ice Harbor Dam | April 7 | October 22 | 199 |
| Kennewick | March 28 | October 30 | 216 |
| Kent | March 20 | November 10 | 233 |
| Lacrosse | May 13 | September 26 | 133 |
| Landsburg | April 20 | October 25 | 187 |
| Leavenworth 3 S | May 10 | September 30 | 142 |
| Lind 3 Ne | May 7 | October 4 | 150 |
| Long Beach Exp Stn | April 6 | October 26 | 200 |
| Longmire Rainier Nps | May 22 | October 3 | 134 |
| Longview | April 8 | November 5 | 210 |
| Matlock 8 S | April 23 | October 20 | 183 |
| Mayfield Pwr Plt | April 7 | November 13 | 215 |
| Mazama | May 9 | September 29 | 142 |
| Mcmillin Rsvr | April 11 | October 30 | 202 |
| Mcnary Dam | March 27 | November 4 | 221 |
| Methow 2 S | April 21 | October 15 | 177 |
| Monroe | April 17 | October 23 | 188 |
| Moses Lake Grant Co Airport | April 27 | October 8 | 165 |
| Moxee City 10 E | May 4 | October 10 | 155 |
| Mt Adams Rs | May 18 | September 25 | 125 |
| Mt Vernon 3 Wnw | March 24 | November 3 | 224 |
| Mud Mtn Dam | April 18 | October 31 | 196 |
| Naselle 2 Ene | April 24 | October 20 | 179 |
| Newhalem | April 2 | November 14 | 224 |
| Newport | May 12 | September 21 | 130 |
| Northport | May 8 | October 1 | 143 |
| Odessa | May 14 | September 26 | 135 |
| Olga 2 Se | February 26 | November 29 | 276 |
| Olympia Airport | April 29 | October 14 | 169 |
| Omak Airport | April 30 | October 7 | 160 |
| Packwood | April 30 | October 8 | 162 |
| Palmer 3 Ese | April 3 | November 11 | 219 |
| Pasco Tri Cities Airport | April 27 | October 11 | 168 |
| Plain | May 22 | September 22 | 121 |
| Pomeroy | May 2 | October 4 | 155 |
| Port Angeles | March 12 | November 19 | 252 |
| Port Angeles Intl Airport | April 8 | October 31 | 204 |
| Port Townsend | March 1 | November 28 | 274 |
| Priest Rapids Dam | March 24 | November 4 | 222 |
| Prosser | April 14 | October 22 | 189 |
| Pullman 2 Nw | May 6 | September 29 | 143 |
| Pullman Moscow Rgnl Airport | April 29 | October 2 | 159 |
| Quilcene 2 Sw | April 11 | October 28 | 199 |
| Quillayute State Airport | April 20 | October 26 | 190 |
| Quinault 4 Ne | April 7 | November 10 | 214 |
| Quincy | April 21 | October 16 | 178 |
| Raymond 2 S | April 26 | October 17 | 177 |
| Renton Muni Airport | March 13 | November 16 | 248 |
| Republic | May 30 | September 10 | 102 |
| Richland | April 6 | October 24 | 200 |
| Ritzville 1 Sse | May 7 | October 10 | 153 |
| Rosalia | May 7 | September 28 | 144 |
| Ross Dam | April 8 | November 10 | 214 |
| Sagemoor | April 30 | October 13 | 166 |
| Satus Pass 2 Ssw | June 2 | October 1 | 119 |
| Seattle Boeing Fld | March 13 | November 17 | 247 |
| Seattle Sand Pt Wsfo | March 8 | November 23 | 259 |
| Seattle Tacoma Intl Airport | March 2 | November 23 | 266 |
| Sedro-Woolley | March 27 | November 6 | 224 |
| Selah 2 Ne | May 5 | October 4 | 149 |
| Sequim 2 E | April 21 | October 20 | 181 |
| Shelton Sanderson Fld | April 27 | October 16 | 175 |
| Skamania Fish Hatchery | April 29 | October 22 | 177 |
| Smyrna | April 23 | October 12 | 172 |
| Snoqualmie Falls | March 30 | November 7 | 223 |
| Snowden | May 12 | October 11 | 149 |
| Spokane 17 Ssw | May 30 | September 4 | 94 |
| Spokane Felts Fld | April 26 | October 15 | 170 |
| Spokane Intl Airport | April 26 | October 12 | 168 |
| Spokane Wfo | May 10 | September 26 | 137 |
| St John | April 29 | October 4 | 161 |
| Stampede Pass | May 14 | October 17 | 154 |
| Startup 1 E | April 15 | October 25 | 192 |
| Stehekin 4 Nw | April 27 | October 17 | 173 |
| Sunnyside | May 1 | October 6 | 157 |
| Sunnyside #2 | April 30 | October 8 | 160 |
| Tacoma #1 | March 8 | November 14 | 250 |
| Tacoma Narrows Airport | March 11 | November 21 | 254 |
| The Dalles Muni Airport | April 11 | October 26 | 197 |
| Toledo Faa Airport | April 5 | October 25 | 196 |
| Tolt S Fk Rsvr | April 13 | November 10 | 210 |
| Tonasket 11Ne | May 6 | October 6 | 151 |
| Tonasket 4 Nne | April 26 | October 10 | 168 |
| Upper Baker Dam | April 24 | October 29 | 190 |
| Vancouver 4 Nne | April 26 | October 18 | 177 |
| Vancouver Pearson Airport | March 29 | November 9 | 223 |
| Walla Walla Rgnl Airport | March 27 | October 31 | 219 |
| Wapato | April 21 | October 15 | 176 |
| Waterville | May 14 | October 1 | 140 |
| Wenatchee | April 4 | October 28 | 208 |
| Wenatchee Pangborn Airport | April 8 | October 24 | 200 |
| Whidbey Island Nas | March 13 | November 14 | 244 |
| Whitman Mission | May 2 | October 1 | 151 |
| Wilbur | June 1 | September 22 | 112 |
| Winthrop 1 Wsw | May 15 | September 22 | 127 |
| Yakima #2 | April 8 | October 23 | 196 |
| Yakima Air Terminal | May 8 | October 4 | 149 |
Sources
- U.S. Annual/Seasonal Climate Normals, 1991 to 2020 (freeze probability dates by station), NOAA National Centers for Environmental Information, checked 1 November 2026
- Annual/Seasonal Normals 1991 to 2020 documentation, NOAA National Centers for Environmental Information, checked 1 November 2026
- 2024 Gazetteer Files, ZIP Code Tabulation Areas, US Census Bureau, checked 1 November 2026