Alaska Frost Dates

The median last spring freeze and first fall freeze (32°F) at 163 NOAA stations in Alaska, 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
Alyeska	272 ft	May 8	September 29	144	Girdwood
Amber Lake	449 ft	May 28	September 13	108	Talkeetna
Anchorage Forecast Office	131 ft	May 5	September 29	147	Anchorage
Anchorage Intl AP	120 ft	May 5	October 1	149	Anchorage
Anchorage Lake Hood AP	90 ft	May 1	October 3	155	Anchorage
Anchorage Merrill Fld	138 ft	May 1	September 29	151	Anchorage
Anchorage Rabbit Creek #2	913 ft	May 12	September 26	137	Anchorage
Anchorage Upper De Armoun	1,335 ft	May 7	September 28	144	Anchorage
Anderson Lake	458 ft	May 16	September 23	130	Lakes
Annette Island AP	109 ft	April 4	October 31	210	Metlakatla
Annex Creek	92 ft	May 3	October 14	164	Juneau
Auke Bay	44 ft	April 27	October 18	174	Juneau
Aurora	443 ft	May 16	September 6	113	Fairbanks
Beaver Falls	35 ft	April 4	November 9	219	Ketchikan
Ben's Farm	127 ft	May 12	September 20	131	Palmer
Bethel AP	102 ft	May 21	September 22	124	Bethel
Bettles AP	642 ft	May 22	August 24	94	Fort Yukon
Big Delta AP	1,277 ft	May 17	September 7	113	Fort Greely
Big River Lakes	60 ft	May 7	October 7	153	Nikiski
Campbell Creek Sci Ctr	258 ft	May 28	September 12	107	Anchorage
Cannery Creek	85 ft	May 16	October 3	140	Valdez
Central #2	920 ft	May 25	August 26	93	Fort Yukon
Clear Sky	646 ft	May 24	September 4	103	Healy
Cold Bay AP	78 ft	May 25	October 4	132	King Cove
College 5 Nw	978 ft	May 13	September 15	125	College
College Obsy	597 ft	May 18	September 6	111	College
Cooper Lake Project	505 ft	May 18	September 27	132	Bear Creek
Cooper Landing 5 W	375 ft	June 12	September 1	81	Funny River
Cordova M K Smith AP	31 ft	May 23	September 19	119	Cordova
Cordova N	25 ft	April 24	October 19	178	Cordova
Cordova Wwtp	10 ft	April 29	October 13	167	Cordova
Craig	43 ft	April 14	November 1	201	Craig
Delta 5 Ne	1,060 ft	June 4	August 22	79	Delta Junction
Delta Junction 20 Se	1,125 ft	June 5	August 21	77	Deltana
Denali 27 N	2,225 ft	May 25	September 8	106	Healy
Dry Creek	1,355 ft	May 30	August 24	86	Deltana
Dutch Harbor	10 ft	May 6	October 18	165	Dutch Harbor
Eagle	850 ft	May 29	August 23	86	Tok
Eagle Rvr 5 Se	498 ft	May 21	September 15	117	Eagle River
Eagle Rvr Gakona Circle	567 ft	May 9	September 26	140	Eagle River
Eagle Rvr Nature Ctr	520 ft	May 16	September 20	127	Eagle River
Eaglecrest Base	1,134 ft	May 21	October 1	133	Juneau
Eielson Fld	547 ft	May 20	September 1	104	Eielson Air Force Base
Eklutna Wtp	640 ft	May 18	September 20	125	Gateway
Elfin Cove	20 ft	April 26	November 1	189	Hoonah
Ester	655 ft	May 24	September 1	100	Ester
Fairbanks 11 Ne	1,140 ft	May 12	September 16	127	Farmers Loop
Fairbanks AP #2	427 ft	May 16	September 8	115	South Van Horn
Fairbanks Intl AP	432 ft	May 13	September 13	123	South Van Horn
Fairbanks Midtown	440 ft	May 13	September 10	120	College
Farewell Lake	1,060 ft	May 30	September 5	98	Talkeetna
Fox 2 Se	775 ft	May 28	September 1	96	Farmers Loop
Ft Knox Mine	1,621 ft	May 12	September 17	128	Farmers Loop
Ft Richardson Wtp	470 ft	May 9	September 26	140	Elmendorf Air Force Base
Galena	152 ft	May 18	September 8	113	Unalakleet
Gilmore Creek	945 ft	June 1	August 28	88	Farmers Loop
Glacier Bay	45 ft	May 6	October 10	157	Hoonah
Glen Alps	2,202 ft	May 18	September 23	128	Anchorage
Glennallen 64 N	2,669 ft	June 5	August 24	80	Deltana
Gulkana AP	1,562 ft	June 7	August 21	75	Valdez
Gustavus	40 ft	May 30	September 16	109	Hoonah
Gustavus 2 Ne	20 ft	May 28	September 25	120	Hoonah
Haines #2	95 ft	April 30	October 7	160	Haines
Haines 40NW	820 ft	May 24	September 20	119	Haines
Haines AP	15 ft	April 25	October 12	170	Haines
Hayes River	1,000 ft	June 2	September 8	98	Talkeetna
Healy	1,417 ft	May 27	September 1	97	Healy
Hidden Falls Hatchery	22 ft	April 29	October 25	179	Sitka
Homer 8 Nw	1,080 ft	May 16	September 30	137	Diamond Ridge
Homer 9 E	512 ft	May 27	September 22	118	Fritz Creek
Homer AP	64 ft	May 10	September 29	142	Homer
Hoonah	130 ft	May 9	October 4	148	Hoonah
Hope	180 ft	May 18	September 24	129	Girdwood
Hyder	80 ft	May 4	October 11	160	Ketchikan
Iliamna AP	143 ft	May 10	October 1	144	New Stuyahok
Intricate Bay	120 ft	June 4	September 12	100	Anchor Point
Juneau Dwtn	50 ft	April 20	October 22	185	Juneau
Juneau Forecast Office	106 ft	May 9	October 4	148	Juneau
Juneau Intl AP	16 ft	May 4	October 3	152	Juneau
Juneau Lena Pt	35 ft	April 11	November 1	204	Juneau
Juneau Mile 17	245 ft	April 29	October 20	174	Juneau
Kaltag AP	181 ft	May 25	September 3	101	Unalakleet
Kenai 29 Ene	282 ft	June 1	September 8	99	Sterling
Kenai 9N	126 ft	May 18	September 22	127	Nikiski
Kenai Muni AP	91 ft	May 24	September 12	111	Kenai
Ketchikan 10N	295 ft	April 20	October 26	189	Ketchikan
Ketchikan Intl AP	76 ft	April 22	October 23	184	Ketchikan
Keystone Ridge	1,600 ft	May 15	September 16	124	Ester
King Salmon	63 ft	May 26	September 15	112	Naknek
King Salmon 42 Se	661 ft	June 9	September 11	94	Naknek
Kitoi Bay	60 ft	May 11	October 6	148	Kodiak
Kivalina AP	10 ft	June 10	September 11	93	Noatak
Klawock AP	12 ft	April 29	October 16	170	Klawock
Kobe Hill	800 ft	May 24	September 2	101	Healy
Kodiak AP	80 ft	May 5	October 3	151	Kodiak
Kodiak Wwtp	54 ft	April 29	October 14	168	Kodiak
Kotzebue Ralph Wein AP	30 ft	June 5	September 24	111	Kotzebue
Lake Susitna	2,375 ft	May 30	September 4	97	Sutton-Alpine
Lazy Mtn	733 ft	May 22	September 16	117	Lazy Mountain
Little Port Walter	14 ft	April 21	October 31	193	Kake
Little Su At Hatcher Pass Brg	902 ft	May 18	September 18	123	Fishhook
Main Bay	57 ft	May 19	October 6	140	Girdwood
Matanuska Exp Farm	172 ft	May 14	September 20	129	Gateway
Mcgrath AP	333 ft	May 13	September 13	123	Aniak
Mckinley Park	2,070 ft	June 6	August 25	80	Healy
Metlakatla 6 S	105 ft	April 14	October 25	194	Metlakatla
Mile 42 Steese	960 ft	May 28	August 26	90	Two Rivers
Minchumina	1,025 ft	May 13	September 17	127	Healy
Monashka Creek Dam	130 ft	May 27	September 23	119	Kodiak
Moose Pass 3NW	492 ft	May 31	September 8	100	Bear Creek
N Pole	475 ft	May 18	September 5	110	North Pole
N Pole 1N	496 ft	May 22	September 2	103	North Pole
Nabesna	2,920 ft	June 4	September 1	89	Tok
Nenana Muni AP	360 ft	May 15	September 11	119	Ester
Nome Muni AP	13 ft	June 5	September 3	90	Nome
Northway AP	1,713 ft	May 26	September 1	98	Tok
Ouzinkie	40 ft	May 9	October 4	148	Kodiak
Palmer Job Corps	216 ft	April 24	October 4	163	Palmer
Palmer Muni AP	230 ft	May 6	September 25	142	Palmer
Pelican	12 ft	May 4	October 19	168	Hoonah
Petersburg 1	107 ft	April 29	October 17	171	Petersburg
Port Alcan	1,892 ft	May 28	August 29	93	Tok
Port Alexander	12 ft	April 18	November 5	201	Kake
Port Alsworth	260 ft	May 12	September 24	135	Anchor Point
Port Alsworth 1 Sw	321 ft	June 2	September 12	102	Anchor Point
Port San Juan	40 ft	May 10	October 7	150	Bear Creek
Portage Glacier V C	103 ft	May 27	September 12	108	Girdwood
Pt Baker	20 ft	April 19	October 25	189	Petersburg
Puntilla	1,858 ft	June 7	September 2	87	Talkeetna
Ruby 44 Ese	259 ft	May 22	September 3	104	Healy
Sand Point 1 Ene	240 ft	May 11	October 18	160	Sand Point
Seldovia AP	29 ft	May 10	October 1	144	Homer
Seward 19N	518 ft	May 21	September 26	128	Bear Creek
Seward AP	22 ft	May 2	October 7	158	Seward
Silver Lake	1,200 ft	May 31	September 3	95	Valdez
Sitka 1 Ne	78 ft	May 3	October 18	168	Sitka
Sitka Airport	14 ft	April 12	November 1	203	Sitka
Skagway	35 ft	May 6	October 1	148	Skagway
Skagway AP	20 ft	April 21	October 17	179	Skagway
Skwentna	150 ft	May 23	September 9	109	Willow
Snettisham Pwr Plt	29 ft	May 5	October 15	163	Juneau
Soldotna 5SSW	180 ft	June 11	September 1	82	Kalifornsky
St George Island AP	125 ft	May 31	October 5	127	Dutch Harbor
St Paul Island AP	35 ft	June 4	September 28	116	Dutch Harbor
St. Paul 4 Ne	20 ft	June 5	September 28	115	Dutch Harbor
Sterling 6SW	292 ft	May 20	September 21	124	Soldotna
Sutton 1 W	550 ft	June 1	September 6	97	Sutton-Alpine
Talkeetna AP	350 ft	May 16	September 16	123	Talkeetna
Tanana Calhoun Mem AP	227 ft	May 29	August 28	91	Ester
Thorne Bay	286 ft	May 1	October 13	165	Klawock
Tok #2	1,658 ft	June 3	August 27	85	Tok
Two Rivers	605 ft	May 30	September 2	95	Two Rivers
University Exp Stn	475 ft	May 16	September 8	115	College
Valdez	62 ft	May 14	September 22	131	Valdez
Valdez WSO	95 ft	April 30	October 2	155	Valdez
Wally Noerenberg Hatchery	35 ft	May 20	October 9	142	Girdwood
Whites Crossing	270 ft	May 29	September 7	101	Willow
Whitestone Farms	995 ft	May 26	September 2	99	Big Delta
Whittier	60 ft	April 25	October 14	172	Girdwood
Willow West	205 ft	May 15	September 18	126	Willow
Wrangell AP	56 ft	April 11	November 1	204	Wrangell
Yakutat 3 Sse	26 ft	May 13	September 26	136	Yakutat
Yakutat State AP	33 ft	May 20	September 23	126	Yakutat

Sources

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