Frost dates in Oregon
Across 172 NOAA stations in Oregon, the average last spring frost ranges from January 31 at Brookings to June 11 at Burns Muni Airport.
| Alkali Lake | June 10 | September 14 | 94 |
| Alsea Fh (Fall Creek) | April 13 | November 3 | 202 |
| Antelope 6 Ssw | May 22 | October 3 | 131 |
| Arlington | April 6 | October 21 | 196 |
| Ashland | May 6 | October 8 | 154 |
| Astoria Rgnl Airport | March 26 | November 11 | 232 |
| Aurora State Airport | March 16 | November 14 | 242 |
| Baker City Muni Airport | May 25 | September 15 | 111 |
| Bandon 2 Nne | March 9 | November 27 | 260 |
| Barnes Stn | June 2 | September 17 | 104 |
| Beaverton 2 Ssw | April 1 | November 6 | 222 |
| Belknap Springs 8 N | May 5 | October 12 | 159 |
| Bend | June 6 | September 20 | 105 |
| Bly 4 Se | June 8 | September 17 | 101 |
| Boardman | April 14 | October 21 | 188 |
| Bonneville Dam | March 14 | November 27 | 257 |
| Brookings | January 31 | December 27 | 349 |
| Brookings 2 Se | January 31 | December 27 | 334 |
| Burns Muni Airport | June 11 | September 6 | 85 |
| Cascade Locks | March 24 | November 20 | 242 |
| Cascadia | April 29 | October 13 | 167 |
| Cave Junction 1 Wnw | May 1 | October 12 | 161 |
| Clatskanie | April 24 | October 24 | 184 |
| Cloverdale | March 17 | November 22 | 251 |
| Condon | May 10 | October 7 | 148 |
| Coos Bay 8 Sw | April 15 | October 31 | 199 |
| Coquille City | March 28 | November 6 | 225 |
| Corvallis 10 Ssw | April 11 | October 30 | 203 |
| Corvallis State Univ | April 17 | October 28 | 194 |
| Corvallis Water Bureau | May 15 | October 8 | 145 |
| Cottage Grove 2E | April 24 | October 25 | 183 |
| Cottage Grove Dam | April 12 | November 1 | 205 |
| Cougar Dam | March 2 | November 30 | 274 |
| Dallas 2 Ne | April 16 | November 1 | 199 |
| Dayville 8 Nw | May 4 | October 6 | 155 |
| Detroit Dam | March 9 | December 3 | 270 |
| Dorena | April 16 | October 28 | 194 |
| Drain | April 16 | October 25 | 193 |
| Drewsey | June 5 | September 5 | 91 |
| Dufur | May 12 | October 7 | 148 |
| Elgin | May 24 | September 18 | 114 |
| Elkton 1Sw | April 11 | November 6 | 209 |
| Elkton 3 Sw | March 21 | November 12 | 240 |
| Enterprise 20 Nne | June 8 | September 5 | 84 |
| Estacada 2 Se | March 27 | November 14 | 230 |
| Eugene Mahlon Sweet Airport | April 11 | October 23 | 196 |
| Falls City 2 Ssw | April 18 | November 7 | 202 |
| Fern Ridge-Veneta | April 18 | October 25 | 189 |
| Fields | May 10 | October 7 | 145 |
| Florence #2 | April 10 | November 15 | 220 |
| Forest Grove | April 16 | October 26 | 192 |
| Fossil | June 3 | September 14 | 98 |
| Foster Dam | April 12 | October 28 | 197 |
| Ft Clatsop Natl Mem | March 30 | November 18 | 233 |
| Gerber Dam | May 31 | September 21 | 114 |
| Gold Beach Rs | February 16 | December 16 | 314 |
| Government Camp | May 27 | October 9 | 134 |
| Grants Pass | April 8 | October 28 | 201 |
| Halfway | May 15 | September 24 | 130 |
| Headworks Portland Wtr B | March 27 | November 18 | 239 |
| Heppner | April 26 | October 19 | 174 |
| Hermiston 2 Nw | April 27 | October 7 | 163 |
| Hermiston Muni Airport | April 26 | October 10 | 167 |
| Honeyman Sp | March 28 | November 22 | 237 |
| Hood Rvr Exp Stn | April 20 | October 13 | 177 |
| Howard Prairie Dam | June 8 | September 24 | 108 |
| Huntington | April 23 | October 13 | 172 |
| Idleyld Park 4 Ne | April 27 | October 19 | 176 |
| Illahe | March 30 | November 17 | 233 |
| John Day | May 28 | September 18 | 113 |
| John Day 35 Wnw | April 30 | October 14 | 167 |
| Joseph | May 24 | October 1 | 126 |
| Keno | June 5 | September 20 | 107 |
| Kent | May 15 | October 11 | 147 |
| Klamath Falls Intl Airport | June 9 | September 18 | 99 |
| La Grande | May 6 | October 1 | 146 |
| Lacomb 3 Nne | April 26 | October 24 | 184 |
| Lakeview 2 Nnw | June 4 | September 17 | 102 |
| Langlois #2 | March 16 | November 29 | 258 |
| Laurel Mtn | May 20 | October 23 | 157 |
| Leaburg 1 Sw | April 3 | November 11 | 220 |
| Lebanon | March 14 | November 18 | 248 |
| Lemolo Lake 3 Nnw | June 1 | September 23 | 115 |
| Long Creek | June 5 | September 14 | 99 |
| Lookout Pt Dam | March 7 | November 27 | 263 |
| Lost Creek Dam | April 29 | October 17 | 171 |
| Madras 2 N | May 19 | October 4 | 136 |
| Malheur Branch Exp Stn | April 23 | October 13 | 173 |
| Malheur Refuge Hq | May 29 | September 18 | 113 |
| Mapleton | February 15 | December 9 | 306 |
| Marion Forks Fish Hatchery | May 15 | September 30 | 134 |
| Mc Dermitt 26 N | June 4 | September 26 | 113 |
| Mc Minnville | April 5 | November 7 | 216 |
| Mckenzie Rvr Rs | May 1 | October 10 | 159 |
| Mcminnville Muni Airport | April 15 | October 26 | 195 |
| Mcnary Dam #2 | March 30 | November 4 | 217 |
| Medford Rogue Vly Airport | April 8 | October 29 | 204 |
| Milton Freewater | March 25 | October 29 | 218 |
| Mitchell 2 E | May 22 | October 4 | 135 |
| Molalla 7Ne | March 16 | November 19 | 247 |
| Monument 2 | May 9 | September 27 | 139 |
| Moro | May 12 | October 4 | 143 |
| N Willamette Exp Stn | March 18 | November 13 | 243 |
| Nature Park-Beaverton | February 11 | December 5 | 303 |
| Newport | March 21 | November 27 | 252 |
| Newport 1 Se | February 19 | December 16 | 306 |
| Newport 3N | March 12 | December 10 | 271 |
| North Bend Rgnl Airport | February 21 | December 9 | 294 |
| Nyssa | April 18 | October 18 | 182 |
| O O Rch | June 11 | September 6 | 88 |
| Oakridge Fish Hatchery | April 24 | October 24 | 183 |
| Ontario Ksrv | April 22 | October 9 | 168 |
| Ontario Muni Airport | April 21 | October 14 | 176 |
| Oregon City | March 18 | November 18 | 244 |
| Otis 2 Ne | April 4 | November 16 | 227 |
| Owyhee Dam | May 7 | October 5 | 150 |
| Paisley | June 6 | September 14 | 98 |
| Parkdale 1 Nne | May 13 | October 3 | 142 |
| Pelton Dam | May 5 | October 7 | 154 |
| Pendleton | April 26 | October 16 | 174 |
| Pendleton Branch Exp Stn | May 12 | September 27 | 135 |
| Pendleton Dwtn | April 22 | October 9 | 170 |
| Pendleton Wfo | April 14 | October 22 | 188 |
| Pilot Rock 1 Se | May 7 | October 4 | 147 |
| Port Orford #2 | February 17 | December 3 | 292 |
| Portland Intl Airport | March 13 | November 19 | 247 |
| Portland Kgw-Tv | February 25 | December 1 | 280 |
| Portland Troutdale Airport | March 16 | November 20 | 250 |
| Portland Wfo | March 13 | November 22 | 251 |
| Portland-Hillsboro Airport | April 16 | October 23 | 191 |
| Powers | March 21 | November 14 | 241 |
| Prineville | June 1 | September 22 | 113 |
| Prospect 2 Sw | May 19 | October 3 | 136 |
| Redmond Roberts Fld | June 9 | September 14 | 98 |
| Rex 1 S | March 21 | November 22 | 241 |
| Richland | May 10 | October 1 | 141 |
| Riddle | March 31 | November 6 | 221 |
| Riley 10 Wsw | June 11 | September 11 | 87 |
| Riverside 7 Ssw | June 7 | September 6 | 89 |
| Rockville 5 N | May 29 | September 14 | 108 |
| Rome 2 Nw | June 11 | September 10 | 88 |
| Rome St Airport | May 26 | September 21 | 117 |
| Roseburg Kqen | March 23 | November 18 | 237 |
| Roseburg Rgnl Airport | March 19 | November 20 | 245 |
| Ruch | May 4 | October 13 | 160 |
| Saint Helens Rfd | April 18 | November 7 | 201 |
| Salem Mcnary Fld | April 3 | November 1 | 212 |
| Scappoose Ind Airport | April 10 | November 2 | 209 |
| Scotts Mills 9 Se | April 27 | November 4 | 190 |
| Seaside | April 2 | November 12 | 223 |
| Sexton Summit | May 16 | October 30 | 164 |
| Sheaville 1 Se | May 22 | September 28 | 126 |
| Silver Creek Falls | April 30 | October 22 | 174 |
| Silverton | March 28 | November 10 | 227 |
| Squaw Butte-Northern Great Bas | June 11 | September 28 | 107 |
| Stayton | March 29 | November 6 | 222 |
| Summer Lake 1 S | June 8 | September 15 | 96 |
| The Dalles | April 14 | October 23 | 191 |
| Three Lynx | April 5 | November 8 | 217 |
| Tillamook | April 22 | October 21 | 183 |
| Tillamook 6Se | April 5 | November 4 | 219 |
| Toketee Falls | April 29 | October 18 | 171 |
| Troutdale | March 26 | November 17 | 237 |
| Union | May 11 | September 26 | 136 |
| Vale | May 8 | September 29 | 140 |
| Vernonia #2 | May 8 | October 1 | 144 |
| Wallowa | June 7 | September 9 | 91 |
| Westfall | May 7 | October 3 | 147 |
| Wickiup Dam | June 7 | September 18 | 100 |
| Winchester | March 31 | November 5 | 215 |
| Winchester Bay Coast Grd | March 25 | November 24 | 249 |
| Yachats | February 19 | December 11 | 303 |
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