Frost dates in Alaska
Across 163 NOAA stations in Alaska, the average last spring frost ranges from April 4 at Annette Island Airport to June 12 at Cooper Landing 5 W.
| Alyeska | May 8 | September 29 | 142 |
| Amber Lake | May 28 | September 13 | 107 |
| Anchorage Forecast Office | May 5 | September 29 | 147 |
| Anchorage Intl Airport | May 5 | October 1 | 147 |
| Anchorage Lake Hood Airport | May 1 | October 3 | 156 |
| Anchorage Merrill Fld | May 1 | September 29 | 150 |
| Anchorage Rabbit Creek #2 | May 12 | September 26 | 137 |
| Anchorage Upper De Armoun | May 7 | September 28 | 143 |
| Anderson Lake | May 16 | September 23 | 128 |
| Annette Island Airport | April 4 | October 31 | 208 |
| Annex Creek | May 3 | October 14 | 164 |
| Auke Bay | April 27 | October 18 | 172 |
| Aurora | May 16 | September 6 | 112 |
| Beaver Falls | April 4 | November 9 | 218 |
| Ben'S Farm | May 12 | September 20 | 129 |
| Bethel Airport | May 21 | September 22 | 122 |
| Bettles Airport | May 22 | August 24 | 94 |
| Big Delta Airport | May 17 | September 7 | 113 |
| Big River Lakes | May 7 | October 7 | 151 |
| Campbell Creek Sci Ctr | May 28 | September 12 | 107 |
| Cannery Creek | May 16 | October 3 | 139 |
| Central #2 | May 25 | August 26 | 92 |
| Clear Sky | May 24 | September 4 | 100 |
| Cold Bay Airport | May 25 | October 4 | 131 |
| College 5 Nw | May 13 | September 15 | 122 |
| College Obsy | May 18 | September 6 | 111 |
| Cooper Lake Project | May 18 | September 27 | 130 |
| Cooper Landing 5 W | June 12 | September 1 | 78 |
| Cordova M K Smith Airport | May 23 | September 19 | 118 |
| Cordova N | April 24 | October 19 | 176 |
| Cordova Wwtp | April 29 | October 13 | 169 |
| Craig | April 14 | November 1 | 201 |
| Delta 5 Ne | June 4 | August 22 | 75 |
| Delta Junction 20 Se | June 5 | August 21 | 75 |
| Denali 27 N | May 25 | September 8 | 105 |
| Dry Creek | May 30 | August 24 | 84 |
| Dutch Harbor | May 6 | October 18 | 164 |
| Eagle | May 29 | August 23 | 86 |
| Eagle Rvr 5 Se | May 21 | September 15 | 116 |
| Eagle Rvr Gakona Circle | May 9 | September 26 | 139 |
| Eagle Rvr Nature Ctr | May 16 | September 20 | 125 |
| Eaglecrest Base | May 21 | October 1 | 132 |
| Eielson Fld | May 20 | September 1 | 104 |
| Eklutna Wtp | May 18 | September 20 | 124 |
| Elfin Cove | April 26 | November 1 | 188 |
| Ester | May 24 | September 1 | 98 |
| Fairbanks 11 Ne | May 12 | September 16 | 124 |
| Fairbanks Ap #2 | May 16 | September 8 | 113 |
| Fairbanks Intl Airport | May 13 | September 13 | 121 |
| Fairbanks Midtown | May 13 | September 10 | 119 |
| Farewell Lake | May 30 | September 5 | 97 |
| Fox 2 Se | May 28 | September 1 | 96 |
| Ft Knox Mine | May 12 | September 17 | 126 |
| Ft Richardson Wtp | May 9 | September 26 | 138 |
| Galena | May 18 | September 8 | 111 |
| Gilmore Creek | June 1 | August 28 | 87 |
| Glacier Bay | May 6 | October 10 | 154 |
| Glen Alps | May 18 | September 23 | 125 |
| Glennallen 64 N | June 5 | August 24 | 76 |
| Gulkana Airport | June 7 | August 21 | 73 |
| Gustavus | May 30 | September 16 | 107 |
| Gustavus 2 Ne | May 28 | September 25 | 116 |
| Haines #2 | April 30 | October 7 | 160 |
| Haines 40Nw | May 24 | September 20 | 118 |
| Haines Airport | April 25 | October 12 | 172 |
| Hayes River | June 2 | September 8 | 98 |
| Healy | May 27 | September 1 | 97 |
| Hidden Falls Hatchery | April 29 | October 25 | 176 |
| Homer 8 Nw | May 16 | September 30 | 136 |
| Homer 9 E | May 27 | September 22 | 116 |
| Homer Airport | May 10 | September 29 | 141 |
| Hoonah | May 9 | October 4 | 145 |
| Hope | May 18 | September 24 | 127 |
| Hyder | May 4 | October 11 | 157 |
| Iliamna Airport | May 10 | October 1 | 144 |
| Intricate Bay | June 4 | September 12 | 98 |
| Juneau Dwtn | April 20 | October 22 | 183 |
| Juneau Forecast Office | May 9 | October 4 | 146 |
| Juneau Intl Airport | May 4 | October 3 | 150 |
| Juneau Lena Pt | April 11 | November 1 | 202 |
| Juneau Mile 17 | April 29 | October 20 | 173 |
| Kaltag Airport | May 25 | September 3 | 101 |
| Kenai 29 Ene | June 1 | September 8 | 94 |
| Kenai 9N | May 18 | September 22 | 125 |
| Kenai Muni Airport | May 24 | September 12 | 110 |
| Ketchikan 10N | April 20 | October 26 | 189 |
| Ketchikan Intl Airport | April 22 | October 23 | 185 |
| Keystone Ridge | May 15 | September 16 | 122 |
| King Salmon | May 26 | September 15 | 111 |
| King Salmon 42 Se | June 9 | September 11 | 93 |
| Kitoi Bay | May 11 | October 6 | 149 |
| Kivalina Airport | June 10 | September 11 | 92 |
| Klawock Airport | April 29 | October 16 | 169 |
| Kobe Hill | May 24 | September 2 | 100 |
| Kodiak Airport | May 5 | October 3 | 151 |
| Kodiak Wwtp | April 29 | October 14 | 168 |
| Kotzebue Ralph Wein Airport | June 5 | September 24 | 110 |
| Lake Susitna | May 30 | September 4 | 95 |
| Lazy Mtn | May 22 | September 16 | 114 |
| Little Port Walter | April 21 | October 31 | 190 |
| Little Su At Hatcher Pass Brg | May 18 | September 18 | 122 |
| Main Bay | May 19 | October 6 | 139 |
| Matanuska Exp Farm | May 14 | September 20 | 127 |
| Mcgrath Airport | May 13 | September 13 | 120 |
| Mckinley Park | June 6 | August 25 | 77 |
| Metlakatla 6 S | April 14 | October 25 | 192 |
| Mile 42 Steese | May 28 | August 26 | 87 |
| Minchumina | May 13 | September 17 | 124 |
| Monashka Creek Dam | May 27 | September 23 | 117 |
| Moose Pass 3Nw | May 31 | September 8 | 99 |
| N Pole | May 18 | September 5 | 110 |
| N Pole 1N | May 22 | September 2 | 102 |
| Nabesna | June 4 | September 1 | 85 |
| Nenana Muni Airport | May 15 | September 11 | 117 |
| Nome Muni Airport | June 5 | September 3 | 88 |
| Northway Airport | May 26 | September 1 | 97 |
| Ouzinkie | May 9 | October 4 | 148 |
| Palmer Job Corps | April 24 | October 4 | 164 |
| Palmer Muni Airport | May 6 | September 25 | 140 |
| Pelican | May 4 | October 19 | 167 |
| Petersburg 1 | April 29 | October 17 | 169 |
| Port Alcan | May 28 | August 29 | 91 |
| Port Alexander | April 18 | November 5 | 198 |
| Port Alsworth | May 12 | September 24 | 134 |
| Port Alsworth 1 Sw | June 2 | September 12 | 101 |
| Port San Juan | May 10 | October 7 | 150 |
| Portage Glacier V C | May 27 | September 12 | 106 |
| Pt Baker | April 19 | October 25 | 187 |
| Puntilla | June 7 | September 2 | 83 |
| Ruby 44 Ese | May 22 | September 3 | 101 |
| Sand Point 1 Ene | May 11 | October 18 | 160 |
| Seldovia Airport | May 10 | October 1 | 145 |
| Seward 19N | May 21 | September 26 | 127 |
| Seward Airport | May 2 | October 7 | 158 |
| Silver Lake | May 31 | September 3 | 95 |
| Sitka 1 Ne | May 3 | October 18 | 166 |
| Sitka Airport | April 12 | November 1 | 201 |
| Skagway | May 6 | October 1 | 146 |
| Skagway Airport | April 21 | October 17 | 176 |
| Skwentna | May 23 | September 9 | 109 |
| Snettisham Pwr Plt | May 5 | October 15 | 162 |
| Soldotna 5Ssw | June 11 | September 1 | 75 |
| St George Island Airport | May 31 | October 5 | 128 |
| St Paul Island Airport | June 4 | September 28 | 114 |
| St. Paul 4 Ne | June 5 | September 28 | 110 |
| Sterling 6Sw | May 20 | September 21 | 123 |
| Sutton 1 W | June 1 | September 6 | 98 |
| Talkeetna Airport | May 16 | September 16 | 122 |
| Tanana Calhoun Mem Airport | May 29 | August 28 | 89 |
| Thorne Bay | May 1 | October 13 | 166 |
| Tok #2 | June 3 | August 27 | 79 |
| Two Rivers | May 30 | September 2 | 95 |
| University Exp Stn | May 16 | September 8 | 114 |
| Valdez | May 14 | September 22 | 129 |
| Valdez Wso | April 30 | October 2 | 157 |
| Wally Noerenberg Hatchery | May 20 | October 9 | 142 |
| Whites Crossing | May 29 | September 7 | 100 |
| Whitestone Farms | May 26 | September 2 | 98 |
| Whittier | April 25 | October 14 | 172 |
| Willow West | May 15 | September 18 | 126 |
| Wrangell Airport | April 11 | November 1 | 202 |
| Yakutat 3 Sse | May 13 | September 26 | 133 |
| Yakutat State Airport | May 20 | September 23 | 124 |
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