Frost Dates in Washington
Across 154 NOAA weather stations in Washington, the average last spring frost falls between February 26 at Olga 2 SE and June 6 at Davenport. At a typical Washington station it is around April 23, with the first fall frost around October 20 and a frost-free season of about 180 days.
Find the frost dates for your ZIP code
A typical Washington season
What shapes frost dates in Washington
- The frost-free season ranges from 94 days at Davenport to 276 days at Olga 2 SE.
- Elevation matters: Stampede Pass, at 3,959 ft, averages its last frost on May 14, while Aberdeen, at 10 ft, averages March 29.
- Gardens in valleys and low spots, where cold air settles, often frost a week or more later in spring than the nearest station.
Frost dates at major airports
| Station | Last frost | Safer date | First frost | Season (days) |
|---|---|---|---|---|
| Bellingham Intl Airport | Mar 31 | Apr 18 | Oct 30 | 211 |
| Darrington 21 NNE | Apr 16 | May 6 | Oct 25 | 192 |
| Deer Park Airport | May 22 | Jun 15 | Sep 14 | 112 |
| Ellensburg Bowers Fld | Apr 28 | May 12 | Oct 7 | 163 |
| Ephrata Muni Airport | Apr 22 | May 6 | Oct 17 | 175 |
| Everett Snohomish Airport | Mar 9 | Mar 29 | Nov 17 | 250 |
| Friday Harbor Airport | Mar 26 | Apr 21 | Nov 10 | 230 |
| Hoquiam Bowerman Airport | Mar 30 | Apr 25 | Nov 14 | 228 |
| Moses Lake Grant Co Airport | Apr 27 | May 11 | Oct 8 | 165 |
| Olympia Airport | Apr 29 | May 15 | Oct 14 | 169 |
| Omak Airport | Apr 30 | May 15 | Oct 7 | 160 |
| Pasco Tri Cities Airport | Apr 27 | May 10 | Oct 11 | 168 |
| Port Angeles Intl Airport | Apr 8 | May 1 | Oct 31 | 204 |
| Pullman Moscow Rgnl Airport | Apr 29 | May 14 | Oct 2 | 159 |
| Quillayute State Airport | Apr 20 | May 10 | Oct 26 | 190 |
| Quinault 4 NE | Apr 7 | May 6 | Nov 10 | 214 |
| Renton Muni Airport | Mar 13 | Mar 31 | Nov 16 | 248 |
| Seattle Boeing Fld | Mar 13 | Apr 1 | Nov 17 | 247 |
| Seattle Sand Pt Wsfo | Mar 8 | Mar 29 | Nov 23 | 259 |
| Seattle Tacoma Intl Airport | Mar 2 | Mar 23 | Nov 23 | 266 |
| Shelton Sanderson Fld | Apr 27 | May 12 | Oct 16 | 175 |
| Spokane 17 SSW | May 30 | Jul 13 | Sep 4 | 94 |
| Spokane Felts Fld | Apr 26 | May 10 | Oct 15 | 170 |
| Spokane Intl Airport | Apr 26 | May 10 | Oct 12 | 168 |
| Stampede Pass | May 14 | Jun 5 | Oct 17 | 154 |
| Tacoma Narrows Airport | Mar 11 | Apr 2 | Nov 21 | 254 |
| The Dalles Muni Airport | Apr 11 | Apr 28 | Oct 26 | 197 |
| Toledo Faa Airport | Apr 5 | May 4 | Oct 25 | 196 |
| Vancouver Pearson Airport | Mar 29 | Apr 18 | Nov 9 | 223 |
| Walla Walla Rgnl Airport | Mar 27 | Apr 22 | Oct 31 | 219 |
| Wenatchee Pangborn Airport | Apr 8 | Apr 23 | Oct 24 | 200 |
| Whidbey Island Nas | Mar 13 | Apr 1 | Nov 14 | 244 |
| Yakima Air Terminal | May 8 | May 27 | Oct 4 | 149 |
All 154 weather stations in Washington
| Station | Elevation (ft) | Last frost | Safer date | First frost | Season (days) |
|---|---|---|---|---|---|
| Aberdeen | 10 | Mar 29 | Apr 20 | Nov 15 | 234 |
| Aberdeen 20NNE | 435 | Apr 15 | May 8 | Nov 2 | 200 |
| Anacortes | 20 | Mar 8 | Mar 28 | Nov 20 | 255 |
| Arlington | 100 | Apr 22 | May 6 | Oct 19 | 181 |
| Baring | 770 | Apr 14 | May 4 | Oct 29 | 197 |
| Battle Ground | 284 | Apr 26 | May 12 | Oct 16 | 174 |
| Bellingham 3 SSW | 15 | Apr 1 | Apr 24 | Nov 2 | 216 |
| Bellingham Intl Airport | 149 | Mar 31 | Apr 18 | Oct 30 | 211 |
| Bickleton | 3,015 | May 16 | Jun 10 | Oct 9 | 144 |
| Blaine | 60 | Mar 31 | Apr 22 | Nov 4 | 219 |
| Boundary Dam | 1,837 | May 4 | May 18 | Oct 4 | 153 |
| Bremerton | 110 | Mar 29 | Apr 24 | Nov 14 | 227 |
| Buckley 1 NE | 685 | Apr 7 | Apr 27 | Oct 30 | 204 |
| Carson Fish Hatchery | 1,134 | May 2 | May 20 | Oct 9 | 161 |
| Cedar Lake | 1,560 | Apr 23 | May 13 | Nov 1 | 193 |
| Centralia | 185 | Apr 22 | May 10 | Oct 27 | 188 |
| Chelan | 1,194 | Apr 17 | Apr 30 | Oct 22 | 187 |
| Chewelah | 1,670 | May 16 | Jun 7 | Sep 15 | 120 |
| Chief Joseph Dam | 834 | Apr 26 | May 13 | Oct 11 | 167 |
| Cle Elum | 1,900 | May 13 | Jun 1 | Sep 25 | 132 |
| Clearbrook | 64 | Apr 18 | May 5 | Oct 18 | 185 |
| Clearwater | 80 | Apr 29 | May 16 | Oct 17 | 171 |
| Colville | 1,554 | May 2 | May 17 | Oct 2 | 153 |
| Concrete Ppl Fish Stn | 195 | Mar 28 | Apr 19 | Nov 14 | 229 |
| Connell 1 W | 1,020 | Apr 30 | May 15 | Oct 12 | 165 |
| Cougar 6 E | 659 | Apr 1 | May 2 | Nov 18 | 227 |
| Coulee Dam 1 SW | 1,719 | Apr 22 | May 7 | Oct 21 | 180 |
| Coupeville 1 S | 50 | Mar 17 | Apr 3 | Nov 11 | 237 |
| Cushman Powerhouse #2 | 21 | Mar 24 | Apr 17 | Nov 15 | 235 |
| Darrington 21 NNE | 407 | Apr 16 | May 6 | Oct 25 | 192 |
| Darrington Rs | 550 | Apr 16 | May 5 | Oct 23 | 190 |
| Davenport | 2,369 | Jun 6 | Jul 5 | Sep 11 | 94 |
| Dayton 1 WSW | 1,557 | Apr 28 | May 14 | Oct 13 | 168 |
| Deer Park Airport | 2,191 | May 22 | Jun 15 | Sep 14 | 112 |
| Diablo Dam | 891 | Apr 10 | May 1 | Nov 1 | 203 |
| Easton | 2,170 | May 9 | May 26 | Oct 6 | 151 |
| Ellensburg | 1,480 | May 8 | May 25 | Oct 2 | 146 |
| Ellensburg Bowers Fld | 1,766 | Apr 28 | May 12 | Oct 7 | 163 |
| Elma | 70 | May 1 | May 19 | Oct 14 | 169 |
| Eltopia 8 WSW | 700 | Apr 21 | May 6 | Oct 22 | 182 |
| Elwha Rs | 360 | Apr 9 | Apr 29 | Nov 3 | 209 |
| Entiat Fish Hatchery | 1,027 | Apr 5 | May 2 | Oct 24 | 200 |
| Ephrata Muni Airport | 1,252 | Apr 22 | May 6 | Oct 17 | 175 |
| Everett | 60 | Mar 24 | Apr 11 | Nov 2 | 223 |
| Everett Snohomish Airport | 606 | Mar 9 | Mar 29 | Nov 17 | 250 |
| Forks 1 E | 350 | Apr 26 | May 10 | Oct 25 | 182 |
| Friday Harbor Airport | 109 | Mar 26 | Apr 21 | Nov 10 | 230 |
| Glenoma | 840 | Apr 24 | May 12 | Oct 15 | 176 |
| Goldendale | 1,640 | May 19 | Jun 9 | Sep 25 | 126 |
| Grayland | 10 | Mar 29 | Apr 24 | Nov 7 | 224 |
| Grays Rvr Hatchery | 100 | Apr 27 | May 18 | Oct 22 | 178 |
| Harrington | 2,159 | May 31 | Jun 28 | Sep 12 | 101 |
| Hartline | 1,906 | May 2 | May 22 | Oct 12 | 162 |
| Hatton 9 SE | 1,505 | Apr 25 | May 11 | Oct 15 | 173 |
| Holden Village | 3,218 | May 25 | Jun 12 | Sep 19 | 114 |
| Hoquiam Bowerman Airport | 12 | Mar 30 | Apr 25 | Nov 14 | 228 |
| Humptulips Salmon Hatchery | 140 | Apr 26 | May 15 | Oct 22 | 180 |
| Ice Harbor Dam | 368 | Apr 7 | Apr 30 | Oct 22 | 199 |
| Kennewick | 390 | Mar 28 | Apr 10 | Oct 30 | 216 |
| Kent | 30 | Mar 20 | Apr 8 | Nov 10 | 233 |
| Lacrosse | 1,476 | May 13 | Jun 1 | Sep 26 | 133 |
| Landsburg | 535 | Apr 20 | May 10 | Oct 25 | 187 |
| Leavenworth 3 S | 1,128 | May 10 | May 28 | Sep 30 | 142 |
| Lind 3 NE | 1,630 | May 7 | May 21 | Oct 4 | 150 |
| Long Beach Exp Stn | 25 | Apr 6 | Apr 28 | Oct 26 | 200 |
| Longmire Rainier Nps | 2,762 | May 22 | Jun 9 | Oct 3 | 134 |
| Longview | 12 | Apr 8 | May 2 | Nov 5 | 210 |
| Matlock 8 S | 110 | Apr 23 | May 7 | Oct 20 | 183 |
| Mayfield Pwr Plt | 280 | Apr 7 | May 8 | Nov 13 | 215 |
| Mazama | 2,141 | May 9 | May 24 | Sep 29 | 142 |
| Mcmillin Rsvr | 579 | Apr 11 | Apr 29 | Oct 30 | 202 |
| Mcnary Dam | 361 | Mar 27 | Apr 14 | Nov 4 | 221 |
| Methow 2 S | 1,135 | Apr 21 | May 10 | Oct 15 | 177 |
| Monroe | 120 | Apr 17 | May 7 | Oct 23 | 188 |
| Moses Lake Grant Co Airport | 1,196 | Apr 27 | May 11 | Oct 8 | 165 |
| Moxee City 10 E | 1,550 | May 4 | May 23 | Oct 10 | 155 |
| Mt Adams Rs | 1,950 | May 18 | Jun 12 | Sep 25 | 125 |
| Mt Vernon 3 WNW | 14 | Mar 24 | Apr 14 | Nov 3 | 224 |
| Mud Mtn Dam | 1,308 | Apr 18 | May 10 | Oct 31 | 196 |
| Naselle 2 ENE | 50 | Apr 24 | May 11 | Oct 20 | 179 |
| Newhalem | 525 | Apr 2 | Apr 27 | Nov 14 | 224 |
| Newport | 2,162 | May 12 | May 29 | Sep 21 | 130 |
| Northport | 1,497 | May 8 | May 26 | Oct 1 | 143 |
| Odessa | 1,543 | May 14 | May 31 | Sep 26 | 135 |
| Olga 2 SE | 80 | Feb 26 | Mar 23 | Nov 29 | 276 |
| Olympia Airport | 188 | Apr 29 | May 15 | Oct 14 | 169 |
| Omak Airport | 1,296 | Apr 30 | May 15 | Oct 7 | 160 |
| Packwood | 1,060 | Apr 30 | May 17 | Oct 8 | 162 |
| Palmer 3 ESE | 920 | Apr 3 | May 2 | Nov 11 | 219 |
| Pasco Tri Cities Airport | 407 | Apr 27 | May 10 | Oct 11 | 168 |
| Plain | 1,936 | May 22 | Jun 13 | Sep 22 | 121 |
| Pomeroy | 1,934 | May 2 | May 19 | Oct 4 | 155 |
| Port Angeles | 90 | Mar 12 | Apr 1 | Nov 19 | 252 |
| Port Angeles Intl Airport | 288 | Apr 8 | May 1 | Oct 31 | 204 |
| Port Townsend | 100 | Mar 1 | Mar 23 | Nov 28 | 274 |
| Priest Rapids Dam | 428 | Mar 24 | Apr 7 | Nov 4 | 222 |
| Prosser | 830 | Apr 14 | May 7 | Oct 22 | 189 |
| Pullman 2 NW | 2,515 | May 6 | May 25 | Sep 29 | 143 |
| Pullman Moscow Rgnl Airport | 2,551 | Apr 29 | May 14 | Oct 2 | 159 |
| Quilcene 2 SW | 123 | Apr 11 | May 1 | Oct 28 | 199 |
| Quillayute State Airport | 185 | Apr 20 | May 10 | Oct 26 | 190 |
| Quinault 4 NE | 286 | Apr 7 | May 6 | Nov 10 | 214 |
| Quincy | 1,286 | Apr 21 | May 5 | Oct 16 | 178 |
| Raymond 2 S | 30 | Apr 26 | May 12 | Oct 17 | 177 |
| Renton Muni Airport | 29 | Mar 13 | Mar 31 | Nov 16 | 248 |
| Republic | 2,555 | May 30 | Jun 17 | Sep 10 | 102 |
| Richland | 373 | Apr 6 | Apr 24 | Oct 24 | 200 |
| Ritzville 1 SSE | 1,864 | May 7 | May 27 | Oct 10 | 153 |
| Rosalia | 2,420 | May 7 | May 25 | Sep 28 | 144 |
| Ross Dam | 1,236 | Apr 8 | Apr 30 | Nov 10 | 214 |
| Sagemoor | 595 | Apr 30 | May 16 | Oct 13 | 166 |
| Satus Pass 2 SSW | 2,585 | Jun 2 | Jun 22 | Oct 1 | 119 |
| Seattle Boeing Fld | 20 | Mar 13 | Apr 1 | Nov 17 | 247 |
| Seattle Sand Pt Wsfo | 60 | Mar 8 | Mar 29 | Nov 23 | 259 |
| Seattle Tacoma Intl Airport | 370 | Mar 2 | Mar 23 | Nov 23 | 266 |
| Sedro-Woolley | 60 | Mar 27 | Apr 17 | Nov 6 | 224 |
| Selah 2 NE | 1,120 | May 5 | May 23 | Oct 4 | 149 |
| Sequim 2 E | 50 | Apr 21 | May 7 | Oct 20 | 181 |
| Shelton Sanderson Fld | 271 | Apr 27 | May 12 | Oct 16 | 175 |
| Skamania Fish Hatchery | 435 | Apr 29 | May 15 | Oct 22 | 177 |
| Smyrna | 560 | Apr 23 | May 7 | Oct 12 | 172 |
| Snoqualmie Falls | 440 | Mar 30 | Apr 21 | Nov 7 | 223 |
| Snowden | 2,415 | May 12 | Jun 7 | Oct 11 | 149 |
| Spokane 17 SSW | 2,267 | May 30 | Jul 13 | Sep 4 | 94 |
| Spokane Felts Fld | 1,953 | Apr 26 | May 10 | Oct 15 | 170 |
| Spokane Intl Airport | 2,353 | Apr 26 | May 10 | Oct 12 | 168 |
| Spokane Wfo | 2,392 | May 10 | May 30 | Sep 26 | 137 |
| St John | 1,952 | Apr 29 | May 15 | Oct 4 | 161 |
| Stampede Pass | 3,959 | May 14 | Jun 5 | Oct 17 | 154 |
| Startup 1 E | 170 | Apr 15 | May 7 | Oct 25 | 192 |
| Stehekin 4 NW | 1,257 | Apr 27 | May 12 | Oct 17 | 173 |
| Sunnyside | 747 | May 1 | May 18 | Oct 6 | 157 |
| Sunnyside #2 | 805 | Apr 30 | May 13 | Oct 8 | 160 |
| Tacoma #1 | 25 | Mar 8 | Mar 31 | Nov 14 | 250 |
| Tacoma Narrows Airport | 292 | Mar 11 | Apr 2 | Nov 21 | 254 |
| The Dalles Muni Airport | 235 | Apr 11 | Apr 28 | Oct 26 | 197 |
| Toledo Faa Airport | 379 | Apr 5 | May 4 | Oct 25 | 196 |
| Tolt S Fk Rsvr | 2,000 | Apr 13 | May 4 | Nov 10 | 210 |
| Tonasket 11NE | 3,434 | May 6 | May 25 | Oct 6 | 151 |
| Tonasket 4 NNE | 960 | Apr 26 | May 11 | Oct 10 | 168 |
| Upper Baker Dam | 690 | Apr 24 | May 9 | Oct 29 | 190 |
| Vancouver 4 NNE | 210 | Apr 26 | May 10 | Oct 18 | 177 |
| Vancouver Pearson Airport | 30 | Mar 29 | Apr 18 | Nov 9 | 223 |
| Walla Walla Rgnl Airport | 1,166 | Mar 27 | Apr 22 | Oct 31 | 219 |
| Wapato | 841 | Apr 21 | May 7 | Oct 15 | 176 |
| Waterville | 2,664 | May 14 | Jun 4 | Oct 1 | 140 |
| Wenatchee | 626 | Apr 4 | Apr 19 | Oct 28 | 208 |
| Wenatchee Pangborn Airport | 1,229 | Apr 8 | Apr 23 | Oct 24 | 200 |
| Whidbey Island Nas | 47 | Mar 13 | Apr 1 | Nov 14 | 244 |
| Whitman Mission | 632 | May 2 | May 18 | Oct 1 | 151 |
| Wilbur | 2,262 | Jun 1 | Jun 22 | Sep 22 | 112 |
| Winthrop 1 WSW | 1,749 | May 15 | Jun 1 | Sep 22 | 127 |
| Yakima #2 | 1,142 | Apr 8 | Apr 28 | Oct 23 | 196 |
| Yakima Air Terminal | 1,064 | May 8 | May 27 | Oct 4 | 149 |
No station matches that name. Try a nearby town, or look up your ZIP code above.
Last frost and first frost are averages (a 50% chance of frost later in spring or earlier in fall). Safer date is the spring date with only a 10% chance of a later frost.
Using these dates
Plant hardy crops like peas and spinach several weeks before your last frost, and tender crops like tomatoes and peppers after it, once nights stay above 50°F. The Seed Starting Calculator turns your frost date into sowing and planting dates, and When to Plant Tomatoes explains the timing in detail.
Data: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, 32°F threshold.
Frost dates in other states
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