Oregon Frost Dates

The median last spring freeze and first fall freeze (32°F) at 172 NOAA stations in Oregon, 1991-2020, with the growing season between them.

Every station

A median date has an even chance of a later freeze in spring or an earlier one in fall. Each town page gives the dates at 36, 32 and 28°F and every probability from 10 to 90 percent.

Station	Elevation	Last freeze	First freeze	Season, days	Town page
Alkali Lake	4,332 ft	June 10	September 14	96	Lakeview
Alsea Fh (fall Creek)	230 ft	April 13	November 3	204	Waldport
Antelope 6 Ssw	3,030 ft	May 22	October 3	134	Madras
Arlington	277 ft	April 6	October 21	198	Arlington
Ashland	1,729 ft	May 6	October 8	155	Ashland
Astoria Rgnl AP	9 ft	March 26	November 11	230	Warrenton
Aurora State AP	196 ft	March 16	November 14	243	Aurora
Baker City Muni AP	3,361 ft	May 25	September 15	113	Baker City
Bandon 2 Nne	23 ft	March 9	November 27	263	Bandon
Barnes Stn	3,970 ft	June 2	September 17	107	Prineville
Beaverton 2 Ssw	270 ft	April 1	November 6	219	Beaverton
Belknap Springs 8 N	2,152 ft	May 5	October 12	160	Sisters
Bend	3,660 ft	June 6	September 20	106	Bend
Bly 4 Se	4,560 ft	June 8	September 17	101	Lakeview
Boardman	280 ft	April 14	October 21	190	Boardman
Bonneville Dam	62 ft	March 14	November 27	258
Brookings	82 ft	January 31	December 27	331	Brookings
Brookings 2 Se	50 ft	January 31	December 27	331	Harbor
Burns Muni AP	4,140 ft	June 11	September 6	87	Burns
Cascade Locks	142 ft	March 24	November 20	241	Cascade Locks
Cascadia	960 ft	April 29	October 13	167	Sweet Home
Cave Junction 1 Wnw	1,377 ft	May 1	October 12	164	Cave Junction
Clatskanie	22 ft	April 24	October 24	183	Clatskanie
Cloverdale	12 ft	March 17	November 22	250	Pacific City
Condon	2,881 ft	May 10	October 7	150	Condon
Coos Bay 8 Sw	12 ft	April 15	October 31	199	Barview
Coquille City	23 ft	March 28	November 6	223	Coquille
Corvallis 10 Ssw	312 ft	April 11	October 30	202	Monroe
Corvallis State Univ	225 ft	April 17	October 28	194	Adair Village
Corvallis Water Bureau	592 ft	May 15	October 8	146	Philomath
Cottage Grove 2E	595 ft	April 24	October 25	184	Cottage Grove
Cottage Grove Dam	831 ft	April 12	November 1	203	Cottage Grove
Cougar Dam	1,260 ft	March 2	November 30	273	Oakridge
Dallas 2 Ne	290 ft	April 16	November 1	199	Dallas
Dayville 8 Nw	2,260 ft	May 4	October 6	155	Mount Vernon
Detroit Dam	1,220 ft	March 9	December 3	269	Mill City
Dorena	820 ft	April 16	October 28	195	Cottage Grove
Drain	292 ft	April 16	October 25	192	Drain
Drewsey	3,515 ft	June 5	September 5	92	Burns
Dufur	1,330 ft	May 12	October 7	148	Dufur
Elgin	2,697 ft	May 24	September 18	117	Elgin
Elkton 1SW	125 ft	April 11	November 6	209	Drain
Elkton 3 Sw	120 ft	March 21	November 12	236	Drain
Enterprise 20 Nne	3,280 ft	June 8	September 5	89	Enterprise
Estacada 2 Se	514 ft	March 27	November 14	232	Estacada
Eugene Mahlon Sweet AP	353 ft	April 11	October 23	195	Junction City
Falls City 2 Ssw	690 ft	April 18	November 7	203	Falls City
Fern Ridge-Veneta	485 ft	April 18	October 25	190	Veneta
Fields	4,227 ft	May 10	October 7	150	Lakeview
Florence #2	75 ft	April 10	November 15	219	Florence
Forest Grove	180 ft	April 16	October 26	193	Forest Grove
Fossil	2,650 ft	June 3	September 14	103	Fossil
Foster Dam	550 ft	April 12	October 28	199	Sweet Home
Ft Clatsop Natl Mem	42 ft	March 30	November 18	233	Warrenton
Gerber Dam	4,870 ft	May 31	September 21	113	Malin
Gold Beach RS	50 ft	February 16	December 16	304	Gold Beach
Government Camp	3,980 ft	May 27	October 9	135	Mount Hood Village
Grants Pass	932 ft	April 8	October 28	203	Fruitdale
Halfway	2,653 ft	May 15	September 24	132	Joseph
Headworks Portland Wtr B	748 ft	March 27	November 18	236	Sandy
Heppner	1,885 ft	April 26	October 19	176	Heppner
Hermiston 2 Nw	460 ft	April 27	October 7	163	Hermiston
Hermiston Muni AP	641 ft	April 26	October 10	167	Hermiston
Honeyman SP	115 ft	March 28	November 22	239	Dunes City
Hood Rvr Exp Stn	500 ft	April 20	October 13	176	Hood River
Howard Prairie Dam	4,567 ft	June 8	September 24	108	Ashland
Huntington	2,110 ft	April 23	October 13	173
Idleyld Park 4 Ne	1,080 ft	April 27	October 19	175	Glide
Illahe	348 ft	March 30	November 17	232	Powers
John Day	3,063 ft	May 28	September 18	113	John Day
John Day 35 Wnw	2,245 ft	April 30	October 14	167	Mount Vernon
Joseph	4,184 ft	May 24	October 1	130	Joseph
Keno	4,128 ft	June 5	September 20	107
Kent	2,710 ft	May 15	October 11	149	Moro
Klamath Falls Intl AP	4,084 ft	June 9	September 18	101	Altamont
La Grande	2,755 ft	May 6	October 1	148	La Grande
Lacomb 3 Nne	520 ft	April 26	October 24	181	Lacomb
Lakeview 2 Nnw	4,890 ft	June 4	September 17	105	Lakeview
Langlois #2	90 ft	March 16	November 29	258	Port Orford
Laurel Mtn	3,589 ft	May 20	October 23	156	Falls City
Leaburg 1 Sw	675 ft	April 3	November 11	222	Lowell
Lebanon	330 ft	March 14	November 18	249	Lebanon
Lemolo Lake 3 Nnw	4,077 ft	June 1	September 23	114	Oakridge
Long Creek	3,740 ft	June 5	September 14	101	Mount Vernon
Lookout Pt Dam	712 ft	March 7	November 27	265	Lowell
Lost Creek Dam	1,580 ft	April 29	October 17	171	Trail
Madras 2 N	2,443 ft	May 19	October 4	138	Madras
Malheur Branch Exp Stn	2,260 ft	April 23	October 13	173	Ontario
Malheur Refuge Hq	4,118 ft	May 29	September 18	112	Hines
Mapleton	17 ft	February 15	December 9	298	Florence
Marion Forks Fish Hatchery	2,475 ft	May 15	September 30	138	Mill City
Mc Dermitt 26 N	4,464 ft	June 4	September 26	114
Mc Minnville	155 ft	April 5	November 7	216	McMinnville
Mckenzie Rvr RS	1,478 ft	May 1	October 10	162	Sisters
Mcminnville Muni AP	159 ft	April 15	October 26	194	McMinnville
Mcnary Dam #2	361 ft	March 30	November 4	219	Umatilla
Medford Rogue Vly AP	1,297 ft	April 8	October 29	204	Central Point
Milton Freewater	970 ft	March 25	October 29	218	Milton-Freewater
Mitchell 2 E	3,320 ft	May 22	October 4	135	Fossil
Molalla 7NE	647 ft	March 16	November 19	248	Molalla
Monument 2	1,995 ft	May 9	September 27	141	Mount Vernon
Moro	1,870 ft	May 12	October 4	145	Moro
N Willamette Exp Stn	150 ft	March 18	November 13	240	Wilsonville
Nature Park-Beaverton	185 ft	February 11	December 5	298	Aloha
Newport	122 ft	March 21	November 27	251	Newport
Newport 1 Se	8 ft	February 19	December 16	301	Newport
Newport 3N	220 ft	March 12	December 10	273	Agate Beach
North Bend Rgnl AP	17 ft	February 21	December 9	292	North Bend
Nyssa	2,175 ft	April 18	October 18	183	Nyssa
O O Rch	4,136 ft	June 11	September 6	87	Hines
Oakridge Fish Hatchery	1,275 ft	April 24	October 24	183	Oakridge
Ontario Ksrv	2,145 ft	April 22	October 9	170	Ontario
Ontario Muni AP	2,190 ft	April 21	October 14	176	Ontario
Oregon City	167 ft	March 18	November 18	245	Oregon City
Otis 2 Ne	150 ft	April 4	November 16	226	Rose Lodge
Owyhee Dam	2,400 ft	May 7	October 5	151
Paisley	4,360 ft	June 6	September 14	100	Lakeview
Parkdale 1 Nne	1,520 ft	May 13	October 3	143	Odell
Pelton Dam	1,410 ft	May 5	October 7	155	Warm Springs
Pendleton	1,515 ft	April 26	October 16	173	Pendleton
Pendleton Branch Exp Stn	1,487 ft	May 12	September 27	138	Mission
Pendleton Dwtn	1,040 ft	April 22	October 9	170	Pendleton
Pendleton WFO	1,510 ft	April 14	October 22	191	Pendleton
Pilot Rock 1 Se	1,720 ft	May 7	October 4	150	Pilot Rock
Port Orford #2	42 ft	February 17	December 3	290	Port Orford
Portland Intl AP	19 ft	March 13	November 19	251	Maywood Park
Portland Kgw-TV	159 ft	February 25	December 1	280	Portland
Portland Troutdale AP	29 ft	March 16	November 20	249	Wood Village
Portland WFO	21 ft	March 13	November 22	254	Maywood Park
Portland-Hillsboro AP	204 ft	April 16	October 23	190	Hillsboro
Powers	230 ft	March 21	November 14	238	Powers
Prineville	2,876 ft	June 1	September 22	113	Prineville
Prospect 2 Sw	2,482 ft	May 19	October 3	137	Trail
Redmond Roberts Fld	3,043 ft	June 9	September 14	97	Redmond
Rex 1 S	515 ft	March 21	November 22	246	Newberg
Richland	2,215 ft	May 10	October 1	144	Baker City
Riddle	680 ft	March 31	November 6	220	Riddle
Riley 10 Wsw	4,583 ft	June 11	September 11	92	Hines
Riverside 7 Ssw	3,380 ft	June 7	September 6	91	Burns
Rockville 5 N	3,670 ft	May 29	September 14	108
Rome 2 Nw	3,405 ft	June 11	September 10	91
Rome St AP	4,050 ft	May 26	September 21	118
Roseburg Kqen	425 ft	March 23	November 18	240	Roseburg
Roseburg Rgnl AP	525 ft	March 19	November 20	246	Roseburg
Ruch	1,550 ft	May 4	October 13	162	Ruch
Saint Helens Rfd	269 ft	April 18	November 7	203	Warren
Salem Mcnary Fld	205 ft	April 3	November 1	212	Four Corners
Scappoose Ind AP	55 ft	April 10	November 2	206	Scappoose
Scotts Mills 9 Se	2,315 ft	April 27	November 4	191	Lyons
Seaside	10 ft	April 2	November 12	224	Seaside
Sexton Summit	3,832 ft	May 16	October 30	167	Merlin
Sheaville 1 Se	4,620 ft	May 22	September 28	129
Silver Creek Falls	1,350 ft	April 30	October 22	175	Lyons
Silverton	408 ft	March 28	November 10	227	Silverton
Squaw Butte-Northern Great Bas	4,660 ft	June 11	September 28	109	Hines
Stayton	425 ft	March 29	November 6	222	Stayton
Summer Lake 1 S	4,192 ft	June 8	September 15	99	Lakeview
The Dalles	150 ft	April 14	October 23	192
Three Lynx	1,120 ft	April 5	November 8	217	Mount Hood Village
Tillamook	12 ft	April 22	October 21	182	Tillamook
Tillamook 6SE	140 ft	April 5	November 4	213	Tillamook
Toketee Falls	2,060 ft	April 29	October 18	172	Oakridge
Troutdale	33 ft	March 26	November 17	236	Troutdale
Union	2,777 ft	May 11	September 26	138	Union
Vale	2,240 ft	May 8	September 29	144	Vale
Vernonia #2	625 ft	May 8	October 1	146	Vernonia
Wallowa	2,923 ft	June 7	September 9	94	Wallowa
Westfall	3,040 ft	May 7	October 3	149	Vale
Wickiup Dam	4,358 ft	June 7	September 18	103	La Pine
Winchester	460 ft	March 31	November 5	219	Roseburg North
Winchester Bay Coast Grd	8 ft	March 25	November 24	244	Reedsport
Yachats	50 ft	February 19	December 11	296	Yachats

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal freeze probabilities. Public domain.