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Oregon frost dates by weather station

Oregon has 190 NOAA weather stations with 1991–2020 freeze statistics. Median last spring frost dates run from Jan 31 at Brookings to Jun 11 at Squaw Butte-Northern Great Bas.

190Stations
Jan 31Earliest last frostBrookings
Jun 11Latest last frostSquaw Butte-Northern Great Bas
349 daysLongest growing seasonBrookings

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Oregon stations: median (50%) frost dates at 32°F
Station	Last spring frost	First fall frost	Growing season	Elevation
Alkali Lake	Jun 10	Sep 14	94 days	4,332 ft
Alsea Fh (fall Creek)	Apr 13	Nov 3	202 days	230 ft
Antelope 6 SSW	May 22	Oct 3	131 days	3,030 ft
Arlington	Apr 6	Oct 21	196 days	277 ft
Ashland	May 6	Oct 8	154 days	1,729 ft
Astoria Regional Airport	Mar 26	Nov 11	232 days	9 ft
Aurora State Airport	Mar 16	Nov 14	242 days	196 ft
Austin 3 S	any month	any month	74 days	4,213 ft
Baker City Muni Airport	May 25	Sep 15	111 days	3,361 ft
Bandon 2 NNE	Mar 9	Nov 27	260 days	23 ft
Barnes Station	Jun 2	Sep 17	104 days	3,970 ft
Beaverton 2 SSW	Apr 1	Nov 6	222 days	270 ft
Belknap Springs 8 N	May 5	Oct 12	159 days	2,152 ft
Bend	Jun 6	Sep 20	105 days	3,660 ft
Bend 7 NE	any month	any month	95 days	3,358 ft
Bly 4 SE	Jun 8	Sep 17	101 days	4,560 ft
Boardman	Apr 14	Oct 21	188 days	280 ft
Bonneville Dam	Mar 14	Nov 27	257 days	62 ft
Brookings	Jan 31	Dec 27	349 days	82 ft
Brookings 2 SE	Jan 31	Dec 27	334 days	50 ft
Brothers	any month	any month	60 days	4,640 ft
Burns Muni Airport	Jun 11	Sep 6	85 days	4,140 ft
Cascade Locks	Mar 24	Nov 20	242 days	142 ft
Cascadia	Apr 29	Oct 13	167 days	960 ft
Cave Junction 1 WNW	May 1	Oct 12	161 days	1,377 ft
Chemult	any month	any month	23 days	4,760 ft
Chiloquin 12 NW (fort Klamath)	any month	any month	59 days	4,180 ft
Clatskanie	Apr 24	Oct 24	184 days	22 ft
Cloverdale	Mar 17	Nov 22	251 days	12 ft
Condon	May 10	Oct 7	148 days	2,881 ft
Coos Bay 8 SW	Apr 15	Oct 31	199 days	12 ft
Coquille City	Mar 28	Nov 6	225 days	23 ft
Corvallis 10 SSW	Apr 11	Oct 30	203 days	312 ft
Corvallis State Univ	Apr 17	Oct 28	194 days	225 ft
Corvallis Water Bureau	May 15	Oct 8	145 days	592 ft
Cottage Grove 2e	Apr 24	Oct 25	183 days	595 ft
Cottage Grove Dam	Apr 12	Nov 1	205 days	831 ft
Cougar Dam	Mar 2	Nov 30	274 days	1,260 ft
Crater Lake NPS HQ	any month	any month	55 days	6,485 ft
Dallas 2 NE	Apr 16	Nov 1	199 days	290 ft
Dayville 8 NW	May 4	Oct 6	155 days	2,260 ft
Detroit Dam	Mar 9	Dec 3	270 days	1,220 ft
Dorena	Apr 16	Oct 28	194 days	820 ft
Drain	Apr 16	Oct 25	193 days	292 ft
Drewsey	Jun 5	Sep 5	91 days	3,515 ft
Dufur	May 12	Oct 7	148 days	1,330 ft
Elgin	May 24	Sep 18	114 days	2,697 ft
Elkton 1sw	Apr 11	Nov 6	209 days	125 ft
Elkton 3 SW	Mar 21	Nov 12	240 days	120 ft
Enterprise 20 NNE	Jun 8	Sep 5	84 days	3,280 ft
Estacada 2 SE	Mar 27	Nov 14	230 days	514 ft
Eugene Mahlon Sweet Airport	Apr 11	Oct 23	196 days	353 ft
Falls City 2 SSW	Apr 18	Nov 7	202 days	690 ft
Fern Ridge-Veneta	Apr 18	Oct 25	189 days	485 ft
Fields	May 10	Oct 7	145 days	4,227 ft
Florence #2	Apr 10	Nov 15	220 days	75 ft
Forest Grove	Apr 16	Oct 26	192 days	180 ft
Fort Clatsop National Mem	Mar 30	Nov 18	233 days	42 ft
Fossil	Jun 3	Sep 14	98 days	2,650 ft
Foster Dam	Apr 12	Oct 28	197 days	550 ft
Gerber Dam	May 31	Sep 21	114 days	4,870 ft
Gold Beach Ranger Station	Feb 16	Dec 16	314 days	50 ft
Government Camp	May 27	Oct 9	134 days	3,980 ft
Grants Pass	Apr 8	Oct 28	201 days	932 ft
Grizzly	any month	any month	43 days	3,635 ft
Halfway	May 15	Sep 24	130 days	2,653 ft
Hart Mountain Refuge	any month	any month	70 days	5,618 ft
Headworks Portland Wtr B	Mar 27	Nov 18	239 days	748 ft
Heppner	Apr 26	Oct 19	174 days	1,885 ft
Hermiston 2 NW	Apr 27	Oct 7	163 days	460 ft
Hermiston Muni Airport	Apr 26	Oct 10	167 days	641 ft
Honeyman State Park	Mar 28	Nov 22	237 days	115 ft
Hood River Exp. Station	Apr 20	Oct 13	177 days	500 ft
Howard Prairie Dam	Jun 8	Sep 24	108 days	4,567 ft
Huntington	Apr 23	Oct 13	172 days	2,110 ft
Idleyld Park 4 NE	Apr 27	Oct 19	176 days	1,080 ft
Illahe	Mar 30	Nov 17	233 days	348 ft
John Day	May 28	Sep 18	113 days	3,063 ft
John Day 35 WNW	Apr 30	Oct 14	167 days	2,245 ft
Joseph	May 24	Oct 1	126 days	4,184 ft
Keno	Jun 5	Sep 20	107 days	4,128 ft
Kent	May 15	Oct 11	147 days	2,710 ft
Klamath Falls Intl Airport	Jun 9	Sep 18	99 days	4,084 ft
La Grande	May 6	Oct 1	146 days	2,755 ft
Lacomb 3 NNE	Apr 26	Oct 24	184 days	520 ft
Lakeview 2 NNW	Jun 4	Sep 17	102 days	4,890 ft
Langlois #2	Mar 16	Nov 29	258 days	90 ft
Laurel Mountain	May 20	Oct 23	157 days	3,589 ft
Leaburg 1 SW	Apr 3	Nov 11	220 days	675 ft
Lebanon	Mar 14	Nov 18	248 days	330 ft
Lemolo Lake 3 NNW	Jun 1	Sep 23	115 days	4,077 ft
Long Creek	Jun 5	Sep 14	99 days	3,740 ft
Lookout Point Dam	Mar 7	Nov 27	263 days	712 ft
Lost Creek Dam	Apr 29	Oct 17	171 days	1,580 ft
Madras	any month	any month	82 days	2,230 ft
Madras 2 N	May 19	Oct 4	136 days	2,443 ft
Malheur Branch Exp. Station	Apr 23	Oct 13	173 days	2,260 ft
Malheur Refuge HQ	May 29	Sep 18	113 days	4,118 ft
Mapleton	Feb 15	Dec 9	306 days	17 ft
Marion Forks Fish Hatchery	May 15	Sep 30	134 days	2,475 ft
Mc Dermitt 26 N	Jun 4	Sep 26	113 days	4,464 ft
Mc Minnville	Apr 5	Nov 7	216 days	155 ft
McKenzie River Ranger Station	May 1	Oct 10	159 days	1,478 ft
McMinnville Muni Airport	Apr 15	Oct 26	195 days	159 ft
McNary Dam #2	Mar 30	Nov 4	217 days	361 ft
Meacham	any month	any month	48 days	3,723 ft
Medford Rogue Valley Airport	Apr 8	Oct 29	204 days	1,297 ft
Milton Freewater	Mar 25	Oct 29	218 days	970 ft
Mitchell 2 E	May 22	Oct 4	135 days	3,320 ft
Molalla 7ne	Mar 16	Nov 19	247 days	647 ft
Monument 2	May 9	Sep 27	139 days	1,995 ft
Moro	May 12	Oct 4	143 days	1,870 ft
N Willamette Exp. Station	Mar 18	Nov 13	243 days	150 ft
Nature Park-Beaverton	Feb 11	Dec 5	303 days	185 ft
Newport	Mar 21	Nov 27	252 days	122 ft
Newport 1 SE	Feb 19	Dec 16	306 days	8 ft
Newport 3n	Mar 12	Dec 10	271 days	220 ft
North Bend Regional Airport	Feb 21	Dec 9	294 days	17 ft
Nyssa	Apr 18	Oct 18	182 days	2,175 ft
O O Rch	Jun 11	Sep 6	88 days	4,136 ft
Oakridge Fish Hatchery	Apr 24	Oct 24	183 days	1,275 ft
Odell Lake-East	any month	any month	69 days	4,800 ft
Ontario Ksrv	Apr 22	Oct 9	168 days	2,145 ft
Ontario Muni Airport	Apr 21	Oct 14	176 days	2,190 ft
Oregon City	Mar 18	Nov 18	244 days	167 ft
Otis 2 NE	Apr 4	Nov 16	227 days	150 ft
Owyhee Dam	May 7	Oct 5	150 days	2,400 ft
Paisley	Jun 6	Sep 14	98 days	4,360 ft
Parkdale 1 NNE	May 13	Oct 3	142 days	1,520 ft
Paulina	any month	any month	68 days	3,684 ft
Pelton Dam	May 5	Oct 7	154 days	1,410 ft
Pendleton	Apr 26	Oct 16	174 days	1,515 ft
Pendleton Branch Exp. Station	May 12	Sep 27	135 days	1,487 ft
Pendleton Dwtn	Apr 22	Oct 9	170 days	1,040 ft
Pendleton WFO	Apr 14	Oct 22	188 days	1,510 ft
Pilot Rock 1 SE	May 7	Oct 4	147 days	1,720 ft
Port Orford #2	Feb 17	Dec 3	292 days	42 ft
Portland Intl Airport	Mar 13	Nov 19	247 days	19 ft
Portland Kgw-Tv	Feb 25	Dec 1	280 days	159 ft
Portland Troutdale Airport	Mar 16	Nov 20	250 days	29 ft
Portland WFO	Mar 13	Nov 22	251 days	21 ft
Portland-Hillsboro Airport	Apr 16	Oct 23	191 days	204 ft
Powers	Mar 21	Nov 14	241 days	230 ft
Prineville	Jun 1	Sep 22	113 days	2,876 ft
Prospect 2 SW	May 19	Oct 3	136 days	2,482 ft
Redmond Roberts Field	Jun 9	Sep 14	98 days	3,043 ft
Rex 1 S	Mar 21	Nov 22	241 days	515 ft
Richland	May 10	Oct 1	141 days	2,215 ft
Riddle	Mar 31	Nov 6	221 days	680 ft
Riley 10 WSW	Jun 11	Sep 11	87 days	4,583 ft
Riverside 7 SSW	Jun 7	Sep 6	89 days	3,380 ft
Rockville 5 N	May 29	Sep 14	108 days	3,670 ft
Rome 2 NW	Jun 11	Sep 10	88 days	3,405 ft
Rome St. Airport	May 26	Sep 21	117 days	4,050 ft
Roseburg Kqen	Mar 23	Nov 18	237 days	425 ft
Roseburg Regional Airport	Mar 19	Nov 20	245 days	525 ft
Ruch	May 4	Oct 13	160 days	1,550 ft
Saint Helens Rfd	Apr 18	Nov 7	201 days	269 ft
Salem McNary Field	Apr 3	Nov 1	212 days	205 ft
Santiam Junction	any month	any month	65 days	3,750 ft
Scappoose Ind Airport	Apr 10	Nov 2	209 days	55 ft
Scotts Mills 9 SE	Apr 27	Nov 4	190 days	2,315 ft
Seaside	Apr 2	Nov 12	223 days	10 ft
Seneca	any month	any month	24 days	4,660 ft
Sexton Summit	May 16	Oct 30	164 days	3,832 ft
Sheaville 1 SE	May 22	Sep 28	126 days	4,620 ft
Silver Creek Falls	Apr 30	Oct 22	174 days	1,350 ft
Silver Lake Ranger Station	any month	any month	63 days	4,385 ft
Silverton	Mar 28	Nov 10	227 days	408 ft
Sisters	any month	any month	57 days	3,180 ft
Squaw Butte-Northern Great Bas	Jun 11	Sep 28	107 days	4,660 ft
Stayton	Mar 29	Nov 6	222 days	425 ft
Summer Lake 1 S	Jun 8	Sep 15	96 days	4,192 ft
Sunriver	any month	any month	42 days	4,180 ft
The Dalles	Apr 14	Oct 23	191 days	150 ft
The Poplars	any month	any month	64 days	4,310 ft
Three Lynx	Apr 5	Nov 8	217 days	1,120 ft
Tillamook	Apr 22	Oct 21	183 days	12 ft
Tillamook 6se	Apr 5	Nov 4	219 days	140 ft
Toketee Falls	Apr 29	Oct 18	171 days	2,060 ft
Troutdale	Mar 26	Nov 17	237 days	33 ft
Union	May 11	Sep 26	136 days	2,777 ft
Vale	May 8	Sep 29	140 days	2,240 ft
Vernonia #2	May 8	Oct 1	144 days	625 ft
Wallowa	Jun 7	Sep 9	91 days	2,923 ft
Westfall	May 7	Oct 3	147 days	3,040 ft
Wickiup Dam	Jun 7	Sep 18	100 days	4,358 ft
Winchester	Mar 31	Nov 5	215 days	460 ft
Winchester Bay Coast Grd	Mar 25	Nov 24	249 days	8 ft
Yachats	Feb 19	Dec 11	303 days	50 ft

Sources

NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.

Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.