Last frost dates in Washington
154 NOAA weather stations in Washington have thirty years of frost records. The median station sees its last 32 °F night around Apr 22; across the state that ranges from Feb 26 to Jun 6, so pick the station nearest you rather than a state-wide figure.
| Plan sowing from this date | ||||||
|---|---|---|---|---|---|---|
| OLGA 2 SE | Feb 26 | Mar 23 | Jan 23 | Nov 29 | 276 | Plan sowing from this date → |
| PORT TOWNSEND | Mar 1 | Mar 23 | Feb 3 | Nov 28 | 274 | Plan sowing from this date → |
| SEATTLE TACOMA INTL AP | Mar 2 | Mar 23 | Feb 5 | Nov 23 | 266 | Plan sowing from this date → |
| ANACORTES | Mar 8 | Mar 28 | Feb 17 | Nov 20 | 255 | Plan sowing from this date → |
| SEATTLE SAND PT WSFO | Mar 8 | Mar 29 | Feb 13 | Nov 23 | 259 | Plan sowing from this date → |
| TACOMA #1 | Mar 8 | Mar 31 | Feb 15 | Nov 14 | 250 | Plan sowing from this date → |
| EVERETT SNOHOMISH AP | Mar 9 | Mar 29 | Feb 15 | Nov 17 | 250 | Plan sowing from this date → |
| TACOMA NARROWS AP | Mar 11 | Apr 2 | Feb 15 | Nov 21 | 254 | Plan sowing from this date → |
| PORT ANGELES | Mar 12 | Apr 1 | Feb 17 | Nov 19 | 252 | Plan sowing from this date → |
| RENTON MUNI AP | Mar 13 | Mar 31 | Feb 19 | Nov 16 | 248 | Plan sowing from this date → |
| SEATTLE BOEING FLD | Mar 13 | Apr 1 | Feb 20 | Nov 17 | 247 | Plan sowing from this date → |
| WHIDBEY ISLAND NAS | Mar 13 | Apr 1 | Feb 20 | Nov 14 | 244 | Plan sowing from this date → |
| COUPEVILLE 1 S | Mar 17 | Apr 3 | Feb 24 | Nov 11 | 237 | Plan sowing from this date → |
| KENT | Mar 20 | Apr 8 | Feb 27 | Nov 10 | 233 | Plan sowing from this date → |
| CUSHMAN POWERHOUSE #2 | Mar 24 | Apr 17 | Feb 26 | Nov 15 | 235 | Plan sowing from this date → |
| EVERETT | Mar 24 | Apr 11 | Mar 4 | Nov 2 | 223 | Plan sowing from this date → |
| MT VERNON 3 WNW | Mar 24 | Apr 14 | Mar 3 | Nov 3 | 224 | Plan sowing from this date → |
| PRIEST RAPIDS DAM | Mar 24 | Apr 7 | Mar 4 | Nov 4 | 222 | Plan sowing from this date → |
| FRIDAY HARBOR AP | Mar 26 | Apr 21 | Feb 25 | Nov 10 | 230 | Plan sowing from this date → |
| MCNARY DAM | Mar 27 | Apr 14 | Mar 8 | Nov 4 | 221 | Plan sowing from this date → |
| SEDRO-WOOLLEY | Mar 27 | Apr 17 | Mar 8 | Nov 6 | 224 | Plan sowing from this date → |
| WALLA WALLA RGNL AP | Mar 27 | Apr 22 | Mar 3 | Oct 31 | 219 | Plan sowing from this date → |
| CONCRETE PPL FISH STN | Mar 28 | Apr 19 | Mar 7 | Nov 14 | 229 | Plan sowing from this date → |
| KENNEWICK | Mar 28 | Apr 10 | Mar 9 | Oct 30 | 216 | Plan sowing from this date → |
| ABERDEEN | Mar 29 | Apr 20 | Feb 25 | Nov 15 | 234 | Plan sowing from this date → |
| BREMERTON | Mar 29 | Apr 24 | Mar 5 | Nov 14 | 227 | Plan sowing from this date → |
| GRAYLAND | Mar 29 | Apr 24 | Feb 28 | Nov 7 | 224 | Plan sowing from this date → |
| VANCOUVER PEARSON AP | Mar 29 | Apr 18 | Mar 6 | Nov 9 | 223 | Plan sowing from this date → |
| HOQUIAM BOWERMAN AP | Mar 30 | Apr 25 | Feb 28 | Nov 14 | 228 | Plan sowing from this date → |
| SNOQUALMIE FALLS | Mar 30 | Apr 21 | Mar 4 | Nov 7 | 223 | Plan sowing from this date → |
| BELLINGHAM INTL AP | Mar 31 | Apr 18 | Mar 10 | Oct 30 | 211 | Plan sowing from this date → |
| BLAINE | Mar 31 | Apr 22 | Mar 8 | Nov 4 | 219 | Plan sowing from this date → |
| BELLINGHAM 3 SSW | Apr 1 | Apr 24 | Mar 11 | Nov 2 | 216 | Plan sowing from this date → |
| COUGAR 6 E | Apr 1 | May 2 | Mar 6 | Nov 18 | 227 | Plan sowing from this date → |
| NEWHALEM | Apr 2 | Apr 27 | Mar 9 | Nov 14 | 224 | Plan sowing from this date → |
| PALMER 3 ESE | Apr 3 | May 2 | Mar 7 | Nov 11 | 219 | Plan sowing from this date → |
| WENATCHEE | Apr 4 | Apr 19 | Mar 17 | Oct 28 | 208 | Plan sowing from this date → |
| ENTIAT FISH HATCHERY | Apr 5 | May 2 | Mar 17 | Oct 24 | 200 | Plan sowing from this date → |
| TOLEDO FAA AP | Apr 5 | May 4 | Mar 12 | Oct 25 | 196 | Plan sowing from this date → |
| LONG BEACH EXP STN | Apr 6 | Apr 28 | Mar 16 | Oct 26 | 200 | Plan sowing from this date → |
| RICHLAND | Apr 6 | Apr 24 | Mar 22 | Oct 24 | 200 | Plan sowing from this date → |
| BUCKLEY 1 NE | Apr 7 | Apr 27 | Mar 16 | Oct 30 | 204 | Plan sowing from this date → |
| ICE HARBOR DAM | Apr 7 | Apr 30 | Mar 20 | Oct 22 | 199 | Plan sowing from this date → |
| MAYFIELD PWR PLT | Apr 7 | May 8 | Mar 16 | Nov 13 | 215 | Plan sowing from this date → |
| QUINAULT 4 NE | Apr 7 | May 6 | Mar 17 | Nov 10 | 214 | Plan sowing from this date → |
| LONGVIEW | Apr 8 | May 2 | Mar 11 | Nov 5 | 210 | Plan sowing from this date → |
| PORT ANGELES INTL AP | Apr 8 | May 1 | Mar 21 | Oct 31 | 204 | Plan sowing from this date → |
| ROSS DAM | Apr 8 | Apr 30 | Mar 16 | Nov 10 | 214 | Plan sowing from this date → |
| WENATCHEE PANGBORN AP | Apr 8 | Apr 23 | Mar 20 | Oct 24 | 200 | Plan sowing from this date → |
| YAKIMA #2 | Apr 8 | Apr 28 | Mar 23 | Oct 23 | 196 | Plan sowing from this date → |
| ELWHA RS | Apr 9 | Apr 29 | Mar 19 | Nov 3 | 209 | Plan sowing from this date → |
| DIABLO DAM | Apr 10 | May 1 | Mar 22 | Nov 1 | 203 | Plan sowing from this date → |
| MCMILLIN RSVR | Apr 11 | Apr 29 | Mar 23 | Oct 30 | 202 | Plan sowing from this date → |
| QUILCENE 2 SW | Apr 11 | May 1 | Mar 21 | Oct 28 | 199 | Plan sowing from this date → |
| THE DALLES MUNI AP | Apr 11 | Apr 28 | Mar 24 | Oct 26 | 197 | Plan sowing from this date → |
| TOLT S FK RSVR | Apr 13 | May 4 | Mar 23 | Nov 10 | 210 | Plan sowing from this date → |
| BARING | Apr 14 | May 4 | Mar 26 | Oct 29 | 197 | Plan sowing from this date → |
| PROSSER | Apr 14 | May 7 | Mar 24 | Oct 22 | 189 | Plan sowing from this date → |
| ABERDEEN 20NNE | Apr 15 | May 8 | Mar 23 | Nov 2 | 200 | Plan sowing from this date → |
| STARTUP 1 E | Apr 15 | May 7 | Mar 25 | Oct 25 | 192 | Plan sowing from this date → |
| DARRINGTON 21 NNE | Apr 16 | May 6 | Mar 26 | Oct 25 | 192 | Plan sowing from this date → |
| DARRINGTON RS | Apr 16 | May 5 | Mar 27 | Oct 23 | 190 | Plan sowing from this date → |
| CHELAN | Apr 17 | Apr 30 | Apr 3 | Oct 22 | 187 | Plan sowing from this date → |
| MONROE | Apr 17 | May 7 | Mar 29 | Oct 23 | 188 | Plan sowing from this date → |
| CLEARBROOK | Apr 18 | May 5 | Mar 27 | Oct 18 | 185 | Plan sowing from this date → |
| MUD MTN DAM | Apr 18 | May 10 | Mar 28 | Oct 31 | 196 | Plan sowing from this date → |
| LANDSBURG | Apr 20 | May 10 | Mar 31 | Oct 25 | 187 | Plan sowing from this date → |
| QUILLAYUTE STATE AP | Apr 20 | May 10 | Mar 29 | Oct 26 | 190 | Plan sowing from this date → |
| ELTOPIA 8 WSW | Apr 21 | May 6 | Apr 3 | Oct 22 | 182 | Plan sowing from this date → |
| METHOW 2 S | Apr 21 | May 10 | Apr 1 | Oct 15 | 177 | Plan sowing from this date → |
| QUINCY | Apr 21 | May 5 | Apr 5 | Oct 16 | 178 | Plan sowing from this date → |
| SEQUIM 2 E | Apr 21 | May 7 | Apr 3 | Oct 20 | 181 | Plan sowing from this date → |
| WAPATO | Apr 21 | May 7 | Apr 1 | Oct 15 | 176 | Plan sowing from this date → |
| ARLINGTON | Apr 22 | May 6 | Apr 4 | Oct 19 | 181 | Plan sowing from this date → |
| CENTRALIA | Apr 22 | May 10 | Mar 30 | Oct 27 | 188 | Plan sowing from this date → |
| COULEE DAM 1 SW | Apr 22 | May 7 | Apr 5 | Oct 21 | 180 | Plan sowing from this date → |
| EPHRATA MUNI AP | Apr 22 | May 6 | Apr 8 | Oct 17 | 175 | Plan sowing from this date → |
| CEDAR LAKE | Apr 23 | May 13 | Apr 3 | Nov 1 | 193 | Plan sowing from this date → |
| MATLOCK 8 S | Apr 23 | May 7 | Apr 1 | Oct 20 | 183 | Plan sowing from this date → |
| SMYRNA | Apr 23 | May 7 | Apr 3 | Oct 12 | 172 | Plan sowing from this date → |
| GLENOMA | Apr 24 | May 12 | Mar 31 | Oct 15 | 176 | Plan sowing from this date → |
| NASELLE 2 ENE | Apr 24 | May 11 | Mar 31 | Oct 20 | 179 | Plan sowing from this date → |
| UPPER BAKER DAM | Apr 24 | May 9 | Apr 4 | Oct 29 | 190 | Plan sowing from this date → |
| HATTON 9 SE | Apr 25 | May 11 | Apr 4 | Oct 15 | 173 | Plan sowing from this date → |
| BATTLE GROUND | Apr 26 | May 12 | Apr 5 | Oct 16 | 174 | Plan sowing from this date → |
| CHIEF JOSEPH DAM | Apr 26 | May 13 | Apr 9 | Oct 11 | 167 | Plan sowing from this date → |
| FORKS 1 E | Apr 26 | May 10 | Apr 5 | Oct 25 | 182 | Plan sowing from this date → |
| HUMPTULIPS SALMON HATCHERY | Apr 26 | May 15 | Mar 31 | Oct 22 | 180 | Plan sowing from this date → |
| RAYMOND 2 S | Apr 26 | May 12 | Apr 1 | Oct 17 | 177 | Plan sowing from this date → |
| SPOKANE FELTS FLD | Apr 26 | May 10 | Apr 10 | Oct 15 | 170 | Plan sowing from this date → |
| SPOKANE INTL AP | Apr 26 | May 10 | Apr 9 | Oct 12 | 168 | Plan sowing from this date → |
| TONASKET 4 NNE | Apr 26 | May 11 | Apr 6 | Oct 10 | 168 | Plan sowing from this date → |
| VANCOUVER 4 NNE | Apr 26 | May 10 | Apr 7 | Oct 18 | 177 | Plan sowing from this date → |
| GRAYS RVR HATCHERY | Apr 27 | May 18 | Apr 2 | Oct 22 | 178 | Plan sowing from this date → |
| MOSES LAKE GRANT CO AP | Apr 27 | May 11 | Apr 10 | Oct 8 | 165 | Plan sowing from this date → |
| PASCO TRI CITIES AP | Apr 27 | May 10 | Apr 8 | Oct 11 | 168 | Plan sowing from this date → |
| SHELTON SANDERSON FLD | Apr 27 | May 12 | Apr 6 | Oct 16 | 175 | Plan sowing from this date → |
| STEHEKIN 4 NW | Apr 27 | May 12 | Apr 12 | Oct 17 | 173 | Plan sowing from this date → |
| DAYTON 1 WSW | Apr 28 | May 14 | Apr 11 | Oct 13 | 168 | Plan sowing from this date → |
| ELLENSBURG BOWERS FLD | Apr 28 | May 12 | Apr 13 | Oct 7 | 163 | Plan sowing from this date → |
| CLEARWATER | Apr 29 | May 16 | Apr 2 | Oct 17 | 171 | Plan sowing from this date → |
| OLYMPIA AP | Apr 29 | May 15 | Apr 11 | Oct 14 | 169 | Plan sowing from this date → |
| PULLMAN MOSCOW RGNL AP | Apr 29 | May 14 | Apr 7 | Oct 2 | 159 | Plan sowing from this date → |
| SKAMANIA FISH HATCHERY | Apr 29 | May 15 | Apr 5 | Oct 22 | 177 | Plan sowing from this date → |
| ST JOHN | Apr 29 | May 15 | Apr 9 | Oct 4 | 161 | Plan sowing from this date → |
| CONNELL 1 W | Apr 30 | May 15 | Apr 12 | Oct 12 | 165 | Plan sowing from this date → |
| OMAK AP | Apr 30 | May 15 | Apr 14 | Oct 7 | 160 | Plan sowing from this date → |
| PACKWOOD | Apr 30 | May 17 | Apr 12 | Oct 8 | 162 | Plan sowing from this date → |
| SAGEMOOR | Apr 30 | May 16 | Apr 15 | Oct 13 | 166 | Plan sowing from this date → |
| SUNNYSIDE #2 | Apr 30 | May 13 | Apr 19 | Oct 8 | 160 | Plan sowing from this date → |
| ELMA | May 1 | May 19 | Apr 11 | Oct 14 | 169 | Plan sowing from this date → |
| SUNNYSIDE | May 1 | May 18 | Apr 16 | Oct 6 | 157 | Plan sowing from this date → |
| CARSON FISH HATCHERY | May 2 | May 20 | Apr 15 | Oct 9 | 161 | Plan sowing from this date → |
| COLVILLE | May 2 | May 17 | Apr 19 | Oct 2 | 153 | Plan sowing from this date → |
| HARTLINE | May 2 | May 22 | Apr 17 | Oct 12 | 162 | Plan sowing from this date → |
| POMEROY | May 2 | May 19 | Apr 15 | Oct 4 | 155 | Plan sowing from this date → |
| WHITMAN MISSION | May 2 | May 18 | Apr 16 | Oct 1 | 151 | Plan sowing from this date → |
| BOUNDARY DAM | May 4 | May 18 | Apr 20 | Oct 4 | 153 | Plan sowing from this date → |
| MOXEE CITY 10 E | May 4 | May 23 | Apr 21 | Oct 10 | 155 | Plan sowing from this date → |
| SELAH 2 NE | May 5 | May 23 | Apr 24 | Oct 4 | 149 | Plan sowing from this date → |
| PULLMAN 2 NW | May 6 | May 25 | Apr 22 | Sep 29 | 143 | Plan sowing from this date → |
| TONASKET 11NE | May 6 | May 25 | Apr 23 | Oct 6 | 151 | Plan sowing from this date → |
| LIND 3 NE | May 7 | May 21 | Apr 22 | Oct 4 | 150 | Plan sowing from this date → |
| RITZVILLE 1 SSE | May 7 | May 27 | Apr 25 | Oct 10 | 153 | Plan sowing from this date → |
| ROSALIA | May 7 | May 25 | Apr 22 | Sep 28 | 144 | Plan sowing from this date → |
| ELLENSBURG | May 8 | May 25 | Apr 25 | Oct 2 | 146 | Plan sowing from this date → |
| NORTHPORT | May 8 | May 26 | Apr 27 | Oct 1 | 143 | Plan sowing from this date → |
| YAKIMA AIR TERMINAL | May 8 | May 27 | Apr 24 | Oct 4 | 149 | Plan sowing from this date → |
| EASTON | May 9 | May 26 | Apr 25 | Oct 6 | 151 | Plan sowing from this date → |
| MAZAMA | May 9 | May 24 | Apr 28 | Sep 29 | 142 | Plan sowing from this date → |
| LEAVENWORTH 3 S | May 10 | May 28 | Apr 27 | Sep 30 | 142 | Plan sowing from this date → |
| SPOKANE WFO | May 10 | May 30 | Apr 25 | Sep 26 | 137 | Plan sowing from this date → |
| NEWPORT | May 12 | May 29 | Apr 28 | Sep 21 | 130 | Plan sowing from this date → |
| SNOWDEN | May 12 | Jun 7 | Apr 25 | Oct 11 | 149 | Plan sowing from this date → |
| CLE ELUM | May 13 | Jun 1 | Apr 29 | Sep 25 | 132 | Plan sowing from this date → |
| LACROSSE | May 13 | Jun 1 | Apr 28 | Sep 26 | 133 | Plan sowing from this date → |
| ODESSA | May 14 | May 31 | Apr 29 | Sep 26 | 135 | Plan sowing from this date → |
| STAMPEDE PASS | May 14 | Jun 5 | Apr 26 | Oct 17 | 154 | Plan sowing from this date → |
| WATERVILLE | May 14 | Jun 4 | Apr 28 | Oct 1 | 140 | Plan sowing from this date → |
| WINTHROP 1 WSW | May 15 | Jun 1 | Apr 30 | Sep 22 | 127 | Plan sowing from this date → |
| BICKLETON | May 16 | Jun 10 | Apr 28 | Oct 9 | 144 | Plan sowing from this date → |
| CHEWELAH | May 16 | Jun 7 | Apr 30 | Sep 15 | 120 | Plan sowing from this date → |
| MT ADAMS RS | May 18 | Jun 12 | May 1 | Sep 25 | 125 | Plan sowing from this date → |
| GOLDENDALE | May 19 | Jun 9 | May 2 | Sep 25 | 126 | Plan sowing from this date → |
| DEER PARK AP | May 22 | Jun 15 | May 2 | Sep 14 | 112 | Plan sowing from this date → |
| LONGMIRE RAINIER NPS | May 22 | Jun 9 | May 3 | Oct 3 | 134 | Plan sowing from this date → |
| PLAIN | May 22 | Jun 13 | May 2 | Sep 22 | 121 | Plan sowing from this date → |
| HOLDEN VILLAGE | May 25 | Jun 12 | May 7 | Sep 19 | 114 | Plan sowing from this date → |
| REPUBLIC | May 30 | Jun 17 | May 11 | Sep 10 | 102 | Plan sowing from this date → |
| SPOKANE 17 SSW | May 30 | Jul 13 | May 9 | Sep 4 | 94 | Plan sowing from this date → |
| HARRINGTON | May 31 | Jun 28 | May 10 | Sep 12 | 101 | Plan sowing from this date → |
| WILBUR | Jun 1 | Jun 22 | May 10 | Sep 22 | 112 | Plan sowing from this date → |
| SATUS PASS 2 SSW | Jun 2 | Jun 22 | May 9 | Oct 1 | 119 | Plan sowing from this date → |
| DAVENPORT | Jun 6 | Jul 5 | May 13 | Sep 11 | 94 | Plan sowing from this date → |
How to read the three dates
Average is the date by which, in half of the years between 1991 and 2020, the last 32 °F night had already happened. Safe is later: only one year in ten saw a frost after it, which is the date to transplant tomatoes and peppers, both killed by a single frost. Early is the risky end, with a frost after it in nine years out of ten.
Every figure is for the weather station, not for your garden. A valley bottom, a north slope or a spot near a lake can run a week or two either way. Cities are warmer than the countryside around them.
Where the numbers come from
The dates are NOAA's U.S. Climate Normals for 1991 to 2020, computed by the National Centers for Environmental Information for every station with thirty years of daily minimum temperatures. ZIP codes are matched to the nearest such station within 150 km using U.S. Census Bureau ZIP Code Tabulation Area centroids. Stations that never see a frost, such as much of south Florida, report no date and are left out.