Frost Dates in Oregon
Across 172 NOAA weather stations in Oregon, the average last spring frost falls between January 31 at Brookings and June 11 at Squaw Butte-Northern Great Bas. At a typical Oregon station it is around April 22, with the first fall frost around October 22 and a frost-free season of about 183 days.
Find the frost dates for your ZIP code
A typical Oregon season
What shapes frost dates in Oregon
- The frost-free season ranges from 84 days at Enterprise 20 NNE to 349 days at Brookings.
- Elevation matters: Lakeview 2 NNW, at 4,890 ft, averages its last frost on June 4, while Newport 1 SE, at 8 ft, averages February 19.
- 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) |
|---|---|---|---|---|
| Astoria Rgnl Airport | Mar 26 | Apr 18 | Nov 11 | 232 |
| Aurora State Airport | Mar 16 | Apr 7 | Nov 14 | 242 |
| Baker City Muni Airport | May 25 | Jun 16 | Sep 15 | 111 |
| Burns Muni Airport | Jun 11 | Jun 28 | Sep 6 | 85 |
| Coos Bay 8 SW | Apr 15 | May 3 | Oct 31 | 199 |
| Corvallis 10 SSW | Apr 11 | May 5 | Oct 30 | 203 |
| Eugene Mahlon Sweet Airport | Apr 11 | May 9 | Oct 23 | 196 |
| Hermiston Muni Airport | Apr 26 | May 10 | Oct 10 | 167 |
| John Day 35 WNW | Apr 30 | May 14 | Oct 14 | 167 |
| Klamath Falls Intl Airport | Jun 9 | Jun 26 | Sep 18 | 99 |
| Mcminnville Muni Airport | Apr 15 | May 6 | Oct 26 | 195 |
| Medford Rogue Vly Airport | Apr 8 | Apr 30 | Oct 29 | 204 |
| Newport | Mar 21 | Apr 12 | Nov 27 | 252 |
| North Bend Rgnl Airport | Feb 21 | Mar 25 | Dec 9 | 294 |
| Ontario Muni Airport | Apr 21 | May 8 | Oct 14 | 176 |
| Pendleton | Apr 26 | May 10 | Oct 16 | 174 |
| Portland Intl Airport | Mar 13 | Apr 1 | Nov 19 | 247 |
| Portland Troutdale Airport | Mar 16 | Apr 12 | Nov 20 | 250 |
| Portland-Hillsboro Airport | Apr 16 | May 3 | Oct 23 | 191 |
| Redmond Roberts Fld | Jun 9 | Jun 26 | Sep 14 | 98 |
| Riley 10 WSW | Jun 11 | Jul 3 | Sep 11 | 87 |
| Rome St Airport | May 26 | Jun 13 | Sep 21 | 117 |
| Roseburg Rgnl Airport | Mar 19 | Apr 13 | Nov 20 | 245 |
| Salem Mcnary Fld | Apr 3 | Apr 27 | Nov 1 | 212 |
| Scappoose Ind Airport | Apr 10 | May 1 | Nov 2 | 209 |
| Sexton Summit | May 16 | Jun 7 | Oct 30 | 164 |
All 172 weather stations in Oregon
| Station | Elevation (ft) | Last frost | Safer date | First frost | Season (days) |
|---|---|---|---|---|---|
| Alkali Lake | 4,332 | Jun 10 | Jun 27 | Sep 14 | 94 |
| Alsea Fh (fall Creek) | 230 | Apr 13 | May 3 | Nov 3 | 202 |
| Antelope 6 SSW | 3,030 | May 22 | Jun 10 | Oct 3 | 131 |
| Arlington | 277 | Apr 6 | Apr 28 | Oct 21 | 196 |
| Ashland | 1,729 | May 6 | May 27 | Oct 8 | 154 |
| Astoria Rgnl Airport | 9 | Mar 26 | Apr 18 | Nov 11 | 232 |
| Aurora State Airport | 196 | Mar 16 | Apr 7 | Nov 14 | 242 |
| Baker City Muni Airport | 3,361 | May 25 | Jun 16 | Sep 15 | 111 |
| Bandon 2 NNE | 23 | Mar 9 | Apr 7 | Nov 27 | 260 |
| Barnes Stn | 3,970 | Jun 2 | Jun 25 | Sep 17 | 104 |
| Beaverton 2 SSW | 270 | Apr 1 | Apr 26 | Nov 6 | 222 |
| Belknap Springs 8 N | 2,152 | May 5 | May 29 | Oct 12 | 159 |
| Bend | 3,660 | Jun 6 | Jun 22 | Sep 20 | 105 |
| Bly 4 SE | 4,560 | Jun 8 | Jun 23 | Sep 17 | 101 |
| Boardman | 280 | Apr 14 | May 2 | Oct 21 | 188 |
| Bonneville Dam | 62 | Mar 14 | Apr 4 | Nov 27 | 257 |
| Brookings | 82 | Jan 31 | Mar 21 | Dec 27 | 349 |
| Brookings 2 SE | 50 | Jan 31 | Mar 20 | Dec 27 | 334 |
| Burns Muni Airport | 4,140 | Jun 11 | Jun 28 | Sep 6 | 85 |
| Cascade Locks | 142 | Mar 24 | Apr 16 | Nov 20 | 242 |
| Cascadia | 960 | Apr 29 | May 17 | Oct 13 | 167 |
| Cave Junction 1 WNW | 1,377 | May 1 | May 23 | Oct 12 | 161 |
| Clatskanie | 22 | Apr 24 | May 9 | Oct 24 | 184 |
| Cloverdale | 12 | Mar 17 | Apr 15 | Nov 22 | 251 |
| Condon | 2,881 | May 10 | May 27 | Oct 7 | 148 |
| Coos Bay 8 SW | 12 | Apr 15 | May 3 | Oct 31 | 199 |
| Coquille City | 23 | Mar 28 | Apr 27 | Nov 6 | 225 |
| Corvallis 10 SSW | 312 | Apr 11 | May 5 | Oct 30 | 203 |
| Corvallis State Univ | 225 | Apr 17 | May 8 | Oct 28 | 194 |
| Corvallis Water Bureau | 592 | May 15 | Jun 2 | Oct 8 | 145 |
| Cottage Grove 2E | 595 | Apr 24 | May 10 | Oct 25 | 183 |
| Cottage Grove Dam | 831 | Apr 12 | May 4 | Nov 1 | 205 |
| Cougar Dam | 1,260 | Mar 2 | Mar 27 | Nov 30 | 274 |
| Dallas 2 NE | 290 | Apr 16 | May 5 | Nov 1 | 199 |
| Dayville 8 NW | 2,260 | May 4 | May 23 | Oct 6 | 155 |
| Detroit Dam | 1,220 | Mar 9 | Apr 8 | Dec 3 | 270 |
| Dorena | 820 | Apr 16 | May 11 | Oct 28 | 194 |
| Drain | 292 | Apr 16 | May 8 | Oct 25 | 193 |
| Drewsey | 3,515 | Jun 5 | Jun 26 | Sep 5 | 91 |
| Dufur | 1,330 | May 12 | May 31 | Oct 7 | 148 |
| Elgin | 2,697 | May 24 | Jun 21 | Sep 18 | 114 |
| Elkton 1SW | 125 | Apr 11 | May 10 | Nov 6 | 209 |
| Elkton 3 SW | 120 | Mar 21 | Apr 14 | Nov 12 | 240 |
| Enterprise 20 NNE | 3,280 | Jun 8 | Jul 8 | Sep 5 | 84 |
| Estacada 2 SE | 514 | Mar 27 | Apr 23 | Nov 14 | 230 |
| Eugene Mahlon Sweet Airport | 353 | Apr 11 | May 9 | Oct 23 | 196 |
| Falls City 2 SSW | 690 | Apr 18 | May 6 | Nov 7 | 202 |
| Fern Ridge-Veneta | 485 | Apr 18 | May 5 | Oct 25 | 189 |
| Fields | 4,227 | May 10 | Jun 3 | Oct 7 | 145 |
| Florence #2 | 75 | Apr 10 | May 5 | Nov 15 | 220 |
| Forest Grove | 180 | Apr 16 | May 5 | Oct 26 | 192 |
| Fossil | 2,650 | Jun 3 | Jul 3 | Sep 14 | 98 |
| Foster Dam | 550 | Apr 12 | May 5 | Oct 28 | 197 |
| Ft Clatsop Natl Mem | 42 | Mar 30 | Apr 28 | Nov 18 | 233 |
| Gerber Dam | 4,870 | May 31 | Jun 17 | Sep 21 | 114 |
| Gold Beach Rs | 50 | Feb 16 | Mar 25 | Dec 16 | 314 |
| Government Camp | 3,980 | May 27 | Jun 14 | Oct 9 | 134 |
| Grants Pass | 932 | Apr 8 | May 1 | Oct 28 | 201 |
| Halfway | 2,653 | May 15 | Jun 2 | Sep 24 | 130 |
| Headworks Portland Wtr B | 748 | Mar 27 | Apr 20 | Nov 18 | 239 |
| Heppner | 1,885 | Apr 26 | May 11 | Oct 19 | 174 |
| Hermiston 2 NW | 460 | Apr 27 | May 11 | Oct 7 | 163 |
| Hermiston Muni Airport | 641 | Apr 26 | May 10 | Oct 10 | 167 |
| Honeyman Sp | 115 | Mar 28 | Apr 21 | Nov 22 | 237 |
| Hood Rvr Exp Stn | 500 | Apr 20 | May 9 | Oct 13 | 177 |
| Howard Prairie Dam | 4,567 | Jun 8 | Jun 25 | Sep 24 | 108 |
| Huntington | 2,110 | Apr 23 | May 7 | Oct 13 | 172 |
| Idleyld Park 4 NE | 1,080 | Apr 27 | May 15 | Oct 19 | 176 |
| Illahe | 348 | Mar 30 | May 2 | Nov 17 | 233 |
| John Day | 3,063 | May 28 | Jun 15 | Sep 18 | 113 |
| John Day 35 WNW | 2,245 | Apr 30 | May 14 | Oct 14 | 167 |
| Joseph | 4,184 | May 24 | Jul 6 | Oct 1 | 126 |
| Keno | 4,128 | Jun 5 | Jun 22 | Sep 20 | 107 |
| Kent | 2,710 | May 15 | Jun 6 | Oct 11 | 147 |
| Klamath Falls Intl Airport | 4,084 | Jun 9 | Jun 26 | Sep 18 | 99 |
| La Grande | 2,755 | May 6 | May 26 | Oct 1 | 146 |
| Lacomb 3 NNE | 520 | Apr 26 | May 11 | Oct 24 | 184 |
| Lakeview 2 NNW | 4,890 | Jun 4 | Jun 22 | Sep 17 | 102 |
| Langlois #2 | 90 | Mar 16 | Apr 15 | Nov 29 | 258 |
| Laurel Mtn | 3,589 | May 20 | Jun 8 | Oct 23 | 157 |
| Leaburg 1 SW | 675 | Apr 3 | May 2 | Nov 11 | 220 |
| Lebanon | 330 | Mar 14 | Apr 14 | Nov 18 | 248 |
| Lemolo Lake 3 NNW | 4,077 | Jun 1 | Jun 21 | Sep 23 | 115 |
| Long Creek | 3,740 | Jun 5 | Jun 25 | Sep 14 | 99 |
| Lookout Pt Dam | 712 | Mar 7 | Apr 2 | Nov 27 | 263 |
| Lost Creek Dam | 1,580 | Apr 29 | May 19 | Oct 17 | 171 |
| Madras 2 N | 2,443 | May 19 | Jun 7 | Oct 4 | 136 |
| Malheur Branch Exp Stn | 2,260 | Apr 23 | May 9 | Oct 13 | 173 |
| Malheur Refuge Hq | 4,118 | May 29 | Jun 17 | Sep 18 | 113 |
| Mapleton | 17 | Feb 15 | Mar 19 | Dec 9 | 306 |
| Marion Forks Fish Hatchery | 2,475 | May 15 | Jun 11 | Sep 30 | 134 |
| Mc Dermitt 26 N | 4,464 | Jun 4 | Jun 20 | Sep 26 | 113 |
| Mc Minnville | 155 | Apr 5 | Apr 27 | Nov 7 | 216 |
| Mckenzie Rvr Rs | 1,478 | May 1 | May 19 | Oct 10 | 159 |
| Mcminnville Muni Airport | 159 | Apr 15 | May 6 | Oct 26 | 195 |
| Mcnary Dam #2 | 361 | Mar 30 | Apr 20 | Nov 4 | 217 |
| Medford Rogue Vly Airport | 1,297 | Apr 8 | Apr 30 | Oct 29 | 204 |
| Milton Freewater | 970 | Mar 25 | Apr 16 | Oct 29 | 218 |
| Mitchell 2 E | 3,320 | May 22 | Jun 11 | Oct 4 | 135 |
| Molalla 7NE | 647 | Mar 16 | Apr 12 | Nov 19 | 247 |
| Monument 2 | 1,995 | May 9 | May 26 | Sep 27 | 139 |
| Moro | 1,870 | May 12 | May 31 | Oct 4 | 143 |
| N Willamette Exp Stn | 150 | Mar 18 | Apr 10 | Nov 13 | 243 |
| Nature Park-Beaverton | 185 | Feb 11 | Mar 5 | Dec 5 | 303 |
| Newport | 122 | Mar 21 | Apr 12 | Nov 27 | 252 |
| Newport 1 SE | 8 | Feb 19 | Mar 23 | Dec 16 | 306 |
| Newport 3N | 220 | Mar 12 | Apr 16 | Dec 10 | 271 |
| North Bend Rgnl Airport | 17 | Feb 21 | Mar 25 | Dec 9 | 294 |
| Nyssa | 2,175 | Apr 18 | May 4 | Oct 18 | 182 |
| O O Rch | 4,136 | Jun 11 | Jul 1 | Sep 6 | 88 |
| Oakridge Fish Hatchery | 1,275 | Apr 24 | May 11 | Oct 24 | 183 |
| Ontario Ksrv | 2,145 | Apr 22 | May 7 | Oct 9 | 168 |
| Ontario Muni Airport | 2,190 | Apr 21 | May 8 | Oct 14 | 176 |
| Oregon City | 167 | Mar 18 | Apr 11 | Nov 18 | 244 |
| Otis 2 NE | 150 | Apr 4 | May 3 | Nov 16 | 227 |
| Owyhee Dam | 2,400 | May 7 | May 27 | Oct 5 | 150 |
| Paisley | 4,360 | Jun 6 | Jun 28 | Sep 14 | 98 |
| Parkdale 1 NNE | 1,520 | May 13 | Jun 3 | Oct 3 | 142 |
| Pelton Dam | 1,410 | May 5 | May 29 | Oct 7 | 154 |
| Pendleton | 1,515 | Apr 26 | May 10 | Oct 16 | 174 |
| Pendleton Branch Exp Stn | 1,487 | May 12 | Jun 2 | Sep 27 | 135 |
| Pendleton Dwtn | 1,040 | Apr 22 | May 8 | Oct 9 | 170 |
| Pendleton Wfo | 1,510 | Apr 14 | May 5 | Oct 22 | 188 |
| Pilot Rock 1 SE | 1,720 | May 7 | May 28 | Oct 4 | 147 |
| Port Orford #2 | 42 | Feb 17 | Mar 19 | Dec 3 | 292 |
| Portland Intl Airport | 19 | Mar 13 | Apr 1 | Nov 19 | 247 |
| Portland Kgw-Tv | 159 | Feb 25 | Mar 21 | Dec 1 | 280 |
| Portland Troutdale Airport | 29 | Mar 16 | Apr 12 | Nov 20 | 250 |
| Portland Wfo | 21 | Mar 13 | Apr 5 | Nov 22 | 251 |
| Portland-Hillsboro Airport | 204 | Apr 16 | May 3 | Oct 23 | 191 |
| Powers | 230 | Mar 21 | Apr 12 | Nov 14 | 241 |
| Prineville | 2,876 | Jun 1 | Jun 22 | Sep 22 | 113 |
| Prospect 2 SW | 2,482 | May 19 | Jun 9 | Oct 3 | 136 |
| Redmond Roberts Fld | 3,043 | Jun 9 | Jun 26 | Sep 14 | 98 |
| Rex 1 S | 515 | Mar 21 | Apr 19 | Nov 22 | 241 |
| Richland | 2,215 | May 10 | May 29 | Oct 1 | 141 |
| Riddle | 680 | Mar 31 | Apr 27 | Nov 6 | 221 |
| Riley 10 WSW | 4,583 | Jun 11 | Jul 3 | Sep 11 | 87 |
| Riverside 7 SSW | 3,380 | Jun 7 | Jun 28 | Sep 6 | 89 |
| Rockville 5 N | 3,670 | May 29 | Jun 23 | Sep 14 | 108 |
| Rome 2 NW | 3,405 | Jun 11 | Jul 3 | Sep 10 | 88 |
| Rome St Airport | 4,050 | May 26 | Jun 13 | Sep 21 | 117 |
| Roseburg Kqen | 425 | Mar 23 | Apr 16 | Nov 18 | 237 |
| Roseburg Rgnl Airport | 525 | Mar 19 | Apr 13 | Nov 20 | 245 |
| Ruch | 1,550 | May 4 | May 23 | Oct 13 | 160 |
| Saint Helens Rfd | 269 | Apr 18 | May 26 | Nov 7 | 201 |
| Salem Mcnary Fld | 205 | Apr 3 | Apr 27 | Nov 1 | 212 |
| Scappoose Ind Airport | 55 | Apr 10 | May 1 | Nov 2 | 209 |
| Scotts Mills 9 SE | 2,315 | Apr 27 | May 17 | Nov 4 | 190 |
| Seaside | 10 | Apr 2 | Apr 29 | Nov 12 | 223 |
| Sexton Summit | 3,832 | May 16 | Jun 7 | Oct 30 | 164 |
| Sheaville 1 SE | 4,620 | May 22 | Jun 14 | Sep 28 | 126 |
| Silver Creek Falls | 1,350 | Apr 30 | May 15 | Oct 22 | 174 |
| Silverton | 408 | Mar 28 | Apr 19 | Nov 10 | 227 |
| Squaw Butte-Northern Great Bas | 4,660 | Jun 11 | Jun 28 | Sep 28 | 107 |
| Stayton | 425 | Mar 29 | Apr 18 | Nov 6 | 222 |
| Summer Lake 1 S | 4,192 | Jun 8 | Jun 25 | Sep 15 | 96 |
| The Dalles | 150 | Apr 14 | May 1 | Oct 23 | 191 |
| Three Lynx | 1,120 | Apr 5 | Apr 30 | Nov 8 | 217 |
| Tillamook | 12 | Apr 22 | May 13 | Oct 21 | 183 |
| Tillamook 6SE | 140 | Apr 5 | May 4 | Nov 4 | 219 |
| Toketee Falls | 2,060 | Apr 29 | May 16 | Oct 18 | 171 |
| Troutdale | 33 | Mar 26 | Apr 21 | Nov 17 | 237 |
| Union | 2,777 | May 11 | May 31 | Sep 26 | 136 |
| Vale | 2,240 | May 8 | Jun 7 | Sep 29 | 140 |
| Vernonia #2 | 625 | May 8 | May 29 | Oct 1 | 144 |
| Wallowa | 2,923 | Jun 7 | Jul 7 | Sep 9 | 91 |
| Westfall | 3,040 | May 7 | May 28 | Oct 3 | 147 |
| Wickiup Dam | 4,358 | Jun 7 | Jul 2 | Sep 18 | 100 |
| Winchester | 460 | Mar 31 | Apr 26 | Nov 5 | 215 |
| Winchester Bay Coast Grd | 8 | Mar 25 | Apr 27 | Nov 24 | 249 |
| Yachats | 50 | Feb 19 | Mar 23 | Dec 11 | 303 |
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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