Frost dates
Frost dates in Oregon
Typical last spring frost and first fall frost for 172 weather stations across Oregon, from NOAA’s 1991–2020 climate normals.
Last spring frost
Mar 14 – Jun 5
Typical across Oregon (middle: Apr 22)
First fall frost
Sep 17 – Nov 27
Typical across Oregon (middle: Oct 22)
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 |
|---|---|---|---|
| Alkali Lake | Jun 10 | Sep 14 | 96 |
| Alsea Fh (Fall Creek) | Apr 13 | Nov 3 | 204 |
| Antelope 6 SSW | May 22 | Oct 3 | 134 |
| Arlington | Apr 6 | Oct 21 | 198 |
| Ashland | May 6 | Oct 8 | 155 |
| Astoria Regional Airport | Mar 26 | Nov 11 | 230 |
| Aurora State Airport | Mar 16 | Nov 14 | 243 |
| Baker City Municipal Airport | May 25 | Sep 15 | 113 |
| Bandon 2 NNE | Mar 9 | Nov 27 | 263 |
| Barnes Station | Jun 2 | Sep 17 | 107 |
| Beaverton 2 SSW | Apr 1 | Nov 6 | 219 |
| Belknap Springs 8 N | May 5 | Oct 12 | 160 |
| Bend | Jun 6 | Sep 20 | 106 |
| Bly 4 SE | Jun 8 | Sep 17 | 101 |
| Boardman | Apr 14 | Oct 21 | 190 |
| Bonneville Dam | Mar 14 | Nov 27 | 258 |
| Brookings | Jan 31 | Dec 27 | 330 |
| Brookings 2 SE | Jan 31 | Dec 27 | 330 |
| Burns Municipal Airport | Jun 11 | Sep 6 | 87 |
| Cascade Locks | Mar 24 | Nov 20 | 241 |
| Cascadia | Apr 29 | Oct 13 | 167 |
| Cave Junction 1 WNW | May 1 | Oct 12 | 164 |
| Clatskanie | Apr 24 | Oct 24 | 183 |
| Cloverdale | Mar 17 | Nov 22 | 250 |
| Condon | May 10 | Oct 7 | 150 |
| Coos Bay 8 SW | Apr 15 | Oct 31 | 199 |
| Coquille City | Mar 28 | Nov 6 | 223 |
| Corvallis 10 SSW | Apr 11 | Oct 30 | 202 |
| Corvallis State Univ | Apr 17 | Oct 28 | 194 |
| Corvallis Water Bureau | May 15 | Oct 8 | 146 |
| Cottage Grove 2 E | Apr 24 | Oct 25 | 184 |
| Cottage Grove Dam | Apr 12 | Nov 1 | 203 |
| Cougar Dam | Mar 2 | Nov 30 | 273 |
| Dallas 2 NE | Apr 16 | Nov 1 | 199 |
| Dayville 8 NW | May 4 | Oct 6 | 155 |
| Detroit Dam | Mar 9 | Dec 3 | 269 |
| Dorena | Apr 16 | Oct 28 | 195 |
| Drain | Apr 16 | Oct 25 | 192 |
| Drewsey | Jun 5 | Sep 5 | 92 |
| Dufur | May 12 | Oct 7 | 148 |
| Elgin | May 24 | Sep 18 | 117 |
| Elkton 1 SW | Apr 11 | Nov 6 | 209 |
| Elkton 3 SW | Mar 21 | Nov 12 | 236 |
| Enterprise 20 NNE | Jun 8 | Sep 5 | 89 |
| Estacada 2 SE | Mar 27 | Nov 14 | 232 |
| Eugene Mahlon Sweet Airport | Apr 11 | Oct 23 | 195 |
| Falls City 2 SSW | Apr 18 | Nov 7 | 203 |
| Fern Ridge-Veneta | Apr 18 | Oct 25 | 190 |
| Fields | May 10 | Oct 7 | 150 |
| Florence #2 | Apr 10 | Nov 15 | 219 |
| Forest Grove | Apr 16 | Oct 26 | 193 |
| Fort Clatsop Natl Mem | Mar 30 | Nov 18 | 233 |
| Fossil | Jun 3 | Sep 14 | 103 |
| Foster Dam | Apr 12 | Oct 28 | 199 |
| Gerber Dam | May 31 | Sep 21 | 113 |
| Gold Beach RS | Feb 16 | Dec 16 | 303 |
| Government Camp | May 27 | Oct 9 | 135 |
| Grants Pass | Apr 8 | Oct 28 | 203 |
| Halfway | May 15 | Sep 24 | 132 |
| Headworks Portland Wtr B | Mar 27 | Nov 18 | 236 |
| Heppner | Apr 26 | Oct 19 | 176 |
| Hermiston 2 NW | Apr 27 | Oct 7 | 163 |
| Hermiston Municipal Airport | Apr 26 | Oct 10 | 167 |
| Honeyman Sp | Mar 28 | Nov 22 | 239 |
| Hood Rvr Experiment Station | Apr 20 | Oct 13 | 176 |
| Howard Prairie Dam | Jun 8 | Sep 24 | 108 |
| Huntington | Apr 23 | Oct 13 | 173 |
| Idleyld Park 4 NE | Apr 27 | Oct 19 | 175 |
| Illahe | Mar 30 | Nov 17 | 232 |
| John Day | May 28 | Sep 18 | 113 |
| John Day 35 WNW | Apr 30 | Oct 14 | 167 |
| Joseph | May 24 | Oct 1 | 130 |
| Keno | Jun 5 | Sep 20 | 107 |
| Kent | May 15 | Oct 11 | 149 |
| Klamath Falls International Airport | Jun 9 | Sep 18 | 101 |
| La Grande | May 6 | Oct 1 | 148 |
| Lacomb 3 NNE | Apr 26 | Oct 24 | 181 |
| Lakeview 2 NNW | Jun 4 | Sep 17 | 105 |
| Langlois #2 | Mar 16 | Nov 29 | 258 |
| Laurel Mountain | May 20 | Oct 23 | 156 |
| Leaburg 1 SW | Apr 3 | Nov 11 | 222 |
| Lebanon | Mar 14 | Nov 18 | 249 |
| Lemolo Lake 3 NNW | Jun 1 | Sep 23 | 114 |
| Long Creek | Jun 5 | Sep 14 | 101 |
| Lookout Pt Dam | Mar 7 | Nov 27 | 265 |
| Lost Creek Dam | Apr 29 | Oct 17 | 171 |
| Madras 2 N | May 19 | Oct 4 | 138 |
| Malheur Branch Experiment Station | Apr 23 | Oct 13 | 173 |
| Malheur Refuge HQ | May 29 | Sep 18 | 112 |
| Mapleton | Feb 15 | Dec 9 | 297 |
| Marion Forks Fish Hatchery | May 15 | Sep 30 | 138 |
| Mc Dermitt 26 N | Jun 4 | Sep 26 | 114 |
| Mc Minnville | Apr 5 | Nov 7 | 216 |
| Mckenzie Rvr RS | May 1 | Oct 10 | 162 |
| Mcminnville Municipal Airport | Apr 15 | Oct 26 | 194 |
| Mcnary Dam #2 | Mar 30 | Nov 4 | 219 |
| Medford Rogue Vly Airport | Apr 8 | Oct 29 | 204 |
| Milton Freewater | Mar 25 | Oct 29 | 218 |
| Mitchell 2 E | May 22 | Oct 4 | 135 |
| Molalla 7 NE | Mar 16 | Nov 19 | 248 |
| Monument 2 | May 9 | Sep 27 | 141 |
| Moro | May 12 | Oct 4 | 145 |
| N Willamette Experiment Station | Mar 18 | Nov 13 | 240 |
| Nature Park-Beaverton | Feb 11 | Dec 5 | 297 |
| Newport | Mar 21 | Nov 27 | 251 |
| Newport 1 SE | Feb 19 | Dec 16 | 300 |
| Newport 3 N | Mar 12 | Dec 10 | 273 |
| North Bend Regional Airport | Feb 21 | Dec 9 | 291 |
| Nyssa | Apr 18 | Oct 18 | 183 |
| O O Rch | Jun 11 | Sep 6 | 87 |
| Oakridge Fish Hatchery | Apr 24 | Oct 24 | 183 |
| Ontario Ksrv | Apr 22 | Oct 9 | 170 |
| Ontario Municipal Airport | Apr 21 | Oct 14 | 176 |
| Oregon City | Mar 18 | Nov 18 | 245 |
| Otis 2 NE | Apr 4 | Nov 16 | 226 |
| Owyhee Dam | May 7 | Oct 5 | 151 |
| Paisley | Jun 6 | Sep 14 | 100 |
| Parkdale 1 NNE | May 13 | Oct 3 | 143 |
| Pelton Dam | May 5 | Oct 7 | 155 |
| Pendleton | Apr 26 | Oct 16 | 173 |
| Pendleton | Apr 14 | Oct 22 | 191 |
| Pendleton Branch Experiment Station | May 12 | Sep 27 | 138 |
| Pendleton Dwtn | Apr 22 | Oct 9 | 170 |
| Pilot Rock 1 SE | May 7 | Oct 4 | 150 |
| Port Orford #2 | Feb 17 | Dec 3 | 289 |
| Portland | Mar 13 | Nov 22 | 254 |
| Portland International Airport | Mar 13 | Nov 19 | 251 |
| Portland Kgw-Tv | Feb 25 | Dec 1 | 279 |
| Portland Troutdale Airport | Mar 16 | Nov 20 | 249 |
| Portland-Hillsboro Airport | Apr 16 | Oct 23 | 190 |
| Powers | Mar 21 | Nov 14 | 238 |
| Prineville | Jun 1 | Sep 22 | 113 |
| Prospect 2 SW | May 19 | Oct 3 | 137 |
| Redmond Roberts Field | Jun 9 | Sep 14 | 97 |
| Rex 1 S | Mar 21 | Nov 22 | 246 |
| Richland | May 10 | Oct 1 | 144 |
| Riddle | Mar 31 | Nov 6 | 220 |
| Riley 10 WSW | Jun 11 | Sep 11 | 92 |
| Riverside 7 SSW | Jun 7 | Sep 6 | 91 |
| Rockville 5 N | May 29 | Sep 14 | 108 |
| Rome 2 NW | Jun 11 | Sep 10 | 91 |
| Rome St Airport | May 26 | Sep 21 | 118 |
| Roseburg Kqen | Mar 23 | Nov 18 | 240 |
| Roseburg Regional Airport | Mar 19 | Nov 20 | 246 |
| Ruch | May 4 | Oct 13 | 162 |
| Saint Helens Rfd | Apr 18 | Nov 7 | 203 |
| Salem Mcnary Field | Apr 3 | Nov 1 | 212 |
| Scappoose Ind Airport | Apr 10 | Nov 2 | 206 |
| Scotts Mills 9 SE | Apr 27 | Nov 4 | 191 |
| Seaside | Apr 2 | Nov 12 | 224 |
| Sexton Summit | May 16 | Oct 30 | 167 |
| Sheaville 1 SE | May 22 | Sep 28 | 129 |
| Silver Creek Falls | Apr 30 | Oct 22 | 175 |
| Silverton | Mar 28 | Nov 10 | 227 |
| Squaw Butte-Northern Great Bas | Jun 11 | Sep 28 | 109 |
| Stayton | Mar 29 | Nov 6 | 222 |
| Summer Lake 1 S | Jun 8 | Sep 15 | 99 |
| The Dalles | Apr 14 | Oct 23 | 192 |
| Three Lynx | Apr 5 | Nov 8 | 217 |
| Tillamook | Apr 22 | Oct 21 | 182 |
| Tillamook 6 SE | Apr 5 | Nov 4 | 213 |
| Toketee Falls | Apr 29 | Oct 18 | 172 |
| Troutdale | Mar 26 | Nov 17 | 236 |
| Union | May 11 | Sep 26 | 138 |
| Vale | May 8 | Sep 29 | 144 |
| Vernonia #2 | May 8 | Oct 1 | 146 |
| Wallowa | Jun 7 | Sep 9 | 94 |
| Westfall | May 7 | Oct 3 | 149 |
| Wickiup Dam | Jun 7 | Sep 18 | 103 |
| Winchester | Mar 31 | Nov 5 | 219 |
| Winchester Bay Coast Grd | Mar 25 | Nov 24 | 244 |
| Yachats | Feb 19 | Dec 11 | 295 |
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.