Last frost dates in Alaska
163 NOAA weather stations in Alaska have thirty years of frost records. The median station sees its last 32 °F night around May 16; across the state that ranges from Apr 4 to Jun 12, so pick the station nearest you rather than a state-wide figure.
| Plan sowing from this date | ||||||
|---|---|---|---|---|---|---|
| ANNETTE ISLAND AP | Apr 4 | Apr 22 | Mar 20 | Oct 31 | 208 | Plan sowing from this date → |
| BEAVER FALLS | Apr 4 | Apr 25 | Mar 15 | Nov 9 | 218 | Plan sowing from this date → |
| JUNEAU LENA PT | Apr 11 | Apr 27 | Mar 27 | Nov 1 | 202 | Plan sowing from this date → |
| WRANGELL AP | Apr 11 | Apr 29 | Mar 26 | Nov 1 | 202 | Plan sowing from this date → |
| SITKA AIRPORT | Apr 12 | Apr 30 | Mar 28 | Nov 1 | 201 | Plan sowing from this date → |
| CRAIG | Apr 14 | May 2 | Mar 30 | Nov 1 | 201 | Plan sowing from this date → |
| METLAKATLA 6 S | Apr 14 | May 1 | Mar 30 | Oct 25 | 192 | Plan sowing from this date → |
| PORT ALEXANDER | Apr 18 | May 5 | Mar 31 | Nov 5 | 198 | Plan sowing from this date → |
| PT BAKER | Apr 19 | May 5 | Apr 4 | Oct 25 | 187 | Plan sowing from this date → |
| JUNEAU DWTN | Apr 20 | May 5 | Apr 5 | Oct 22 | 183 | Plan sowing from this date → |
| KETCHIKAN 10N | Apr 20 | May 4 | Apr 1 | Oct 26 | 189 | Plan sowing from this date → |
| LITTLE PORT WALTER | Apr 21 | May 9 | Mar 31 | Oct 31 | 190 | Plan sowing from this date → |
| SKAGWAY AP | Apr 21 | May 2 | Apr 9 | Oct 17 | 176 | Plan sowing from this date → |
| KETCHIKAN INTL AP | Apr 22 | May 9 | Apr 2 | Oct 23 | 185 | Plan sowing from this date → |
| CORDOVA N | Apr 24 | May 8 | Apr 10 | Oct 19 | 176 | Plan sowing from this date → |
| PALMER JOB CORPS | Apr 24 | May 9 | Apr 11 | Oct 4 | 164 | Plan sowing from this date → |
| HAINES AP | Apr 25 | May 7 | Apr 10 | Oct 12 | 172 | Plan sowing from this date → |
| WHITTIER | Apr 25 | May 8 | Apr 12 | Oct 14 | 172 | Plan sowing from this date → |
| ELFIN COVE | Apr 26 | May 8 | Apr 8 | Nov 1 | 188 | Plan sowing from this date → |
| AUKE BAY | Apr 27 | May 11 | Apr 12 | Oct 18 | 172 | Plan sowing from this date → |
| CORDOVA WWTP | Apr 29 | May 13 | Apr 9 | Oct 13 | 169 | Plan sowing from this date → |
| HIDDEN FALLS HATCHERY | Apr 29 | May 15 | Apr 15 | Oct 25 | 176 | Plan sowing from this date → |
| JUNEAU MILE 17 | Apr 29 | May 10 | Apr 15 | Oct 20 | 173 | Plan sowing from this date → |
| KLAWOCK AP | Apr 29 | May 14 | Apr 13 | Oct 16 | 169 | Plan sowing from this date → |
| KODIAK WWTP | Apr 29 | May 13 | Apr 14 | Oct 14 | 168 | Plan sowing from this date → |
| PETERSBURG 1 | Apr 29 | May 14 | Apr 15 | Oct 17 | 169 | Plan sowing from this date → |
| HAINES #2 | Apr 30 | May 13 | Apr 16 | Oct 7 | 160 | Plan sowing from this date → |
| VALDEZ WSO | Apr 30 | May 10 | Apr 17 | Oct 2 | 157 | Plan sowing from this date → |
| ANCHORAGE LAKE HOOD AP | May 1 | May 8 | Apr 20 | Oct 3 | 156 | Plan sowing from this date → |
| ANCHORAGE MERRILL FLD | May 1 | May 9 | Apr 19 | Sep 29 | 150 | Plan sowing from this date → |
| THORNE BAY | May 1 | May 16 | Apr 17 | Oct 13 | 166 | Plan sowing from this date → |
| SEWARD AP | May 2 | May 17 | Apr 20 | Oct 7 | 158 | Plan sowing from this date → |
| ANNEX CREEK | May 3 | May 18 | Apr 18 | Oct 14 | 164 | Plan sowing from this date → |
| SITKA 1 NE | May 3 | May 19 | Apr 16 | Oct 18 | 166 | Plan sowing from this date → |
| HYDER | May 4 | May 23 | Apr 22 | Oct 11 | 157 | Plan sowing from this date → |
| JUNEAU INTL AP | May 4 | May 18 | Apr 23 | Oct 3 | 150 | Plan sowing from this date → |
| PELICAN | May 4 | May 18 | Apr 19 | Oct 19 | 167 | Plan sowing from this date → |
| ANCHORAGE FORECAST OFFICE | May 5 | May 14 | Apr 25 | Sep 29 | 147 | Plan sowing from this date → |
| ANCHORAGE INTL AP | May 5 | May 15 | Apr 24 | Oct 1 | 147 | Plan sowing from this date → |
| KODIAK AP | May 5 | May 21 | Apr 19 | Oct 3 | 151 | Plan sowing from this date → |
| SNETTISHAM PWR PLT | May 5 | May 22 | Apr 19 | Oct 15 | 162 | Plan sowing from this date → |
| DUTCH HARBOR | May 6 | May 22 | Apr 23 | Oct 18 | 164 | Plan sowing from this date → |
| GLACIER BAY | May 6 | May 26 | Apr 22 | Oct 10 | 154 | Plan sowing from this date → |
| PALMER MUNI AP | May 6 | May 18 | Apr 24 | Sep 25 | 140 | Plan sowing from this date → |
| SKAGWAY | May 6 | May 22 | Apr 24 | Oct 1 | 146 | Plan sowing from this date → |
| ANCHORAGE UPPER DE ARMOUN | May 7 | May 23 | Apr 23 | Sep 28 | 143 | Plan sowing from this date → |
| BIG RIVER LAKES | May 7 | May 25 | Apr 21 | Oct 7 | 151 | Plan sowing from this date → |
| ALYESKA | May 8 | May 22 | Apr 26 | Sep 29 | 142 | Plan sowing from this date → |
| EAGLE RVR GAKONA CIRCLE | May 9 | May 22 | Apr 29 | Sep 26 | 139 | Plan sowing from this date → |
| FT RICHARDSON WTP | May 9 | May 22 | Apr 28 | Sep 26 | 138 | Plan sowing from this date → |
| HOONAH | May 9 | Jul 4 | Apr 25 | Oct 4 | 145 | Plan sowing from this date → |
| JUNEAU FORECAST OFFICE | May 9 | May 24 | Apr 28 | Oct 4 | 146 | Plan sowing from this date → |
| OUZINKIE | May 9 | May 23 | Apr 22 | Oct 4 | 148 | Plan sowing from this date → |
| HOMER AP | May 10 | May 23 | Apr 27 | Sep 29 | 141 | Plan sowing from this date → |
| ILIAMNA AP | May 10 | May 25 | Apr 28 | Oct 1 | 144 | Plan sowing from this date → |
| PORT SAN JUAN | May 10 | May 28 | Apr 26 | Oct 7 | 150 | Plan sowing from this date → |
| SELDOVIA AP | May 10 | May 24 | Apr 26 | Oct 1 | 145 | Plan sowing from this date → |
| KITOI BAY | May 11 | May 28 | Apr 25 | Oct 6 | 149 | Plan sowing from this date → |
| SAND POINT 1 ENE | May 11 | May 25 | Apr 26 | Oct 18 | 160 | Plan sowing from this date → |
| ANCHORAGE RABBIT CREEK #2 | May 12 | May 24 | Apr 30 | Sep 26 | 137 | Plan sowing from this date → |
| BEN'S FARM | May 12 | May 24 | May 1 | Sep 20 | 129 | Plan sowing from this date → |
| FAIRBANKS 11 NE | May 12 | May 29 | May 2 | Sep 16 | 124 | Plan sowing from this date → |
| FT KNOX MINE | May 12 | May 28 | May 1 | Sep 17 | 126 | Plan sowing from this date → |
| PORT ALSWORTH | May 12 | May 27 | Apr 29 | Sep 24 | 134 | Plan sowing from this date → |
| COLLEGE 5 NW | May 13 | May 31 | May 2 | Sep 15 | 122 | Plan sowing from this date → |
| FAIRBANKS INTL AP | May 13 | May 26 | May 2 | Sep 13 | 121 | Plan sowing from this date → |
| FAIRBANKS MIDTOWN | May 13 | May 28 | May 3 | Sep 10 | 119 | Plan sowing from this date → |
| MCGRATH AP | May 13 | May 28 | May 4 | Sep 13 | 120 | Plan sowing from this date → |
| MINCHUMINA | May 13 | May 28 | May 3 | Sep 17 | 124 | Plan sowing from this date → |
| YAKUTAT 3 SSE | May 13 | May 29 | Apr 29 | Sep 26 | 133 | Plan sowing from this date → |
| MATANUSKA EXP FARM | May 14 | May 26 | May 3 | Sep 20 | 127 | Plan sowing from this date → |
| VALDEZ | May 14 | May 26 | May 2 | Sep 22 | 129 | Plan sowing from this date → |
| KEYSTONE RIDGE | May 15 | May 31 | May 3 | Sep 16 | 122 | Plan sowing from this date → |
| NENANA MUNI AP | May 15 | May 29 | May 3 | Sep 11 | 117 | Plan sowing from this date → |
| WILLOW WEST | May 15 | May 28 | May 3 | Sep 18 | 126 | Plan sowing from this date → |
| ANDERSON LAKE | May 16 | May 31 | May 1 | Sep 23 | 128 | Plan sowing from this date → |
| AURORA | May 16 | May 29 | May 5 | Sep 6 | 112 | Plan sowing from this date → |
| CANNERY CREEK | May 16 | May 29 | May 2 | Oct 3 | 139 | Plan sowing from this date → |
| EAGLE RVR NATURE CTR | May 16 | Jun 9 | May 2 | Sep 20 | 125 | Plan sowing from this date → |
| FAIRBANKS AP #2 | May 16 | May 30 | May 4 | Sep 8 | 113 | Plan sowing from this date → |
| HOMER 8 NW | May 16 | May 30 | May 1 | Sep 30 | 136 | Plan sowing from this date → |
| TALKEETNA AP | May 16 | May 28 | May 6 | Sep 16 | 122 | Plan sowing from this date → |
| UNIVERSITY EXP STN | May 16 | May 30 | May 5 | Sep 8 | 114 | Plan sowing from this date → |
| BIG DELTA AP | May 17 | May 31 | May 3 | Sep 7 | 113 | Plan sowing from this date → |
| COLLEGE OBSY | May 18 | Jun 1 | May 7 | Sep 6 | 111 | Plan sowing from this date → |
| COOPER LAKE PROJECT | May 18 | May 31 | May 6 | Sep 27 | 130 | Plan sowing from this date → |
| EKLUTNA WTP | May 18 | May 30 | May 6 | Sep 20 | 124 | Plan sowing from this date → |
| GALENA | May 18 | Jun 1 | May 8 | Sep 8 | 111 | Plan sowing from this date → |
| GLEN ALPS | May 18 | May 31 | May 4 | Sep 23 | 125 | Plan sowing from this date → |
| HOPE | May 18 | May 28 | May 8 | Sep 24 | 127 | Plan sowing from this date → |
| KENAI 9N | May 18 | May 30 | May 5 | Sep 22 | 125 | Plan sowing from this date → |
| LITTLE SU AT HATCHER PASS BRG | May 18 | May 30 | May 6 | Sep 18 | 122 | Plan sowing from this date → |
| N POLE | May 18 | May 31 | May 6 | Sep 5 | 110 | Plan sowing from this date → |
| MAIN BAY | May 19 | Jun 4 | May 2 | Oct 6 | 139 | Plan sowing from this date → |
| EIELSON FLD | May 20 | Jun 3 | May 10 | Sep 1 | 104 | Plan sowing from this date → |
| STERLING 6SW | May 20 | Jun 1 | May 6 | Sep 21 | 123 | Plan sowing from this date → |
| WALLY NOERENBERG HATCHERY | May 20 | Jun 1 | May 5 | Oct 9 | 142 | Plan sowing from this date → |
| YAKUTAT STATE AP | May 20 | May 31 | May 3 | Sep 23 | 124 | Plan sowing from this date → |
| BETHEL AP | May 21 | Jun 2 | May 8 | Sep 22 | 122 | Plan sowing from this date → |
| EAGLE RVR 5 SE | May 21 | Jun 3 | May 8 | Sep 15 | 116 | Plan sowing from this date → |
| EAGLECREST BASE | May 21 | Jun 2 | May 5 | Oct 1 | 132 | Plan sowing from this date → |
| SEWARD 19N | May 21 | May 31 | May 9 | Sep 26 | 127 | Plan sowing from this date → |
| BETTLES AP | May 22 | Jun 5 | May 11 | Aug 24 | 94 | Plan sowing from this date → |
| LAZY MTN | May 22 | Jun 3 | May 9 | Sep 16 | 114 | Plan sowing from this date → |
| N POLE 1N | May 22 | Jun 4 | May 12 | Sep 2 | 102 | Plan sowing from this date → |
| RUBY 44 ESE | May 22 | Jun 3 | May 12 | Sep 3 | 101 | Plan sowing from this date → |
| CORDOVA M K SMITH AP | May 23 | Jun 5 | May 7 | Sep 19 | 118 | Plan sowing from this date → |
| SKWENTNA | May 23 | Jun 4 | May 8 | Sep 9 | 109 | Plan sowing from this date → |
| CLEAR SKY | May 24 | Jun 12 | May 11 | Sep 4 | 100 | Plan sowing from this date → |
| ESTER | May 24 | Jun 4 | May 12 | Sep 1 | 98 | Plan sowing from this date → |
| HAINES 40NW | May 24 | Jun 10 | May 10 | Sep 20 | 118 | Plan sowing from this date → |
| KENAI MUNI AP | May 24 | Jun 4 | May 8 | Sep 12 | 110 | Plan sowing from this date → |
| KOBE HILL | May 24 | Jun 10 | May 9 | Sep 2 | 100 | Plan sowing from this date → |
| CENTRAL #2 | May 25 | Jun 6 | May 12 | Aug 26 | 92 | Plan sowing from this date → |
| COLD BAY AP | May 25 | Jun 10 | May 9 | Oct 4 | 131 | Plan sowing from this date → |
| DENALI 27 N | May 25 | Jun 3 | May 13 | Sep 8 | 105 | Plan sowing from this date → |
| KALTAG AP | May 25 | Jun 11 | May 10 | Sep 3 | 101 | Plan sowing from this date → |
| KING SALMON | May 26 | Jun 11 | May 9 | Sep 15 | 111 | Plan sowing from this date → |
| NORTHWAY AP | May 26 | Jun 8 | May 13 | Sep 1 | 97 | Plan sowing from this date → |
| WHITESTONE FARMS | May 26 | Jun 9 | May 14 | Sep 2 | 98 | Plan sowing from this date → |
| HEALY | May 27 | Jun 10 | May 11 | Sep 1 | 97 | Plan sowing from this date → |
| HOMER 9 E | May 27 | Jun 8 | May 14 | Sep 22 | 116 | Plan sowing from this date → |
| MONASHKA CREEK DAM | May 27 | Jun 10 | May 8 | Sep 23 | 117 | Plan sowing from this date → |
| PORTAGE GLACIER V C | May 27 | Jun 11 | May 12 | Sep 12 | 106 | Plan sowing from this date → |
| AMBER LAKE | May 28 | Jun 9 | May 14 | Sep 13 | 107 | Plan sowing from this date → |
| CAMPBELL CREEK SCI CTR | May 28 | Jun 6 | May 17 | Sep 12 | 107 | Plan sowing from this date → |
| FOX 2 SE | May 28 | Jun 9 | May 14 | Sep 1 | 96 | Plan sowing from this date → |
| GUSTAVUS 2 NE | May 28 | Jun 12 | May 12 | Sep 25 | 116 | Plan sowing from this date → |
| MILE 42 STEESE | May 28 | Jun 19 | May 15 | Aug 26 | 87 | Plan sowing from this date → |
| PORT ALCAN | May 28 | Jun 10 | May 15 | Aug 29 | 91 | Plan sowing from this date → |
| EAGLE | May 29 | Jun 11 | May 18 | Aug 23 | 86 | Plan sowing from this date → |
| TANANA CALHOUN MEM AP | May 29 | Jun 16 | May 15 | Aug 28 | 89 | Plan sowing from this date → |
| WHITES CROSSING | May 29 | Jun 9 | May 13 | Sep 7 | 100 | Plan sowing from this date → |
| DRY CREEK | May 30 | Jun 13 | May 16 | Aug 24 | 84 | Plan sowing from this date → |
| FAREWELL LAKE | May 30 | Jun 15 | May 12 | Sep 5 | 97 | Plan sowing from this date → |
| GUSTAVUS | May 30 | Jun 22 | May 14 | Sep 16 | 107 | Plan sowing from this date → |
| LAKE SUSITNA | May 30 | Jun 9 | May 20 | Sep 4 | 95 | Plan sowing from this date → |
| TWO RIVERS | May 30 | Jun 13 | May 12 | Sep 2 | 95 | Plan sowing from this date → |
| MOOSE PASS 3NW | May 31 | Jun 15 | May 19 | Sep 8 | 99 | Plan sowing from this date → |
| SILVER LAKE | May 31 | Jun 10 | May 20 | Sep 3 | 95 | Plan sowing from this date → |
| ST GEORGE ISLAND AP | May 31 | Jun 23 | May 10 | Oct 5 | 128 | Plan sowing from this date → |
| GILMORE CREEK | Jun 1 | Jun 17 | May 18 | Aug 28 | 87 | Plan sowing from this date → |
| KENAI 29 ENE | Jun 1 | Jun 18 | May 21 | Sep 8 | 94 | Plan sowing from this date → |
| SUTTON 1 W | Jun 1 | Jun 13 | May 20 | Sep 6 | 98 | Plan sowing from this date → |
| HAYES RIVER | Jun 2 | Jun 11 | May 21 | Sep 8 | 98 | Plan sowing from this date → |
| PORT ALSWORTH 1 SW | Jun 2 | Jun 13 | May 22 | Sep 12 | 101 | Plan sowing from this date → |
| TOK #2 | Jun 3 | Jul 13 | May 22 | Aug 27 | 79 | Plan sowing from this date → |
| DELTA 5 NE | Jun 4 | Jul 17 | May 25 | Aug 22 | 75 | Plan sowing from this date → |
| INTRICATE BAY | Jun 4 | Jun 22 | May 18 | Sep 12 | 98 | Plan sowing from this date → |
| NABESNA | Jun 4 | Jul 3 | May 18 | Sep 1 | 85 | Plan sowing from this date → |
| ST PAUL ISLAND AP | Jun 4 | Jun 25 | May 16 | Sep 28 | 114 | Plan sowing from this date → |
| DELTA JUNCTION 20 SE | Jun 5 | Jun 30 | May 25 | Aug 21 | 75 | Plan sowing from this date → |
| GLENNALLEN 64 N | Jun 5 | Jun 21 | May 27 | Aug 24 | 76 | Plan sowing from this date → |
| KOTZEBUE RALPH WEIN AP | Jun 5 | Jun 17 | May 20 | Sep 24 | 110 | Plan sowing from this date → |
| NOME MUNI AP | Jun 5 | Jun 26 | May 20 | Sep 3 | 88 | Plan sowing from this date → |
| ST. PAUL 4 NE | Jun 5 | Jul 1 | May 16 | Sep 28 | 110 | Plan sowing from this date → |
| MCKINLEY PARK | Jun 6 | Jun 30 | May 22 | Aug 25 | 77 | Plan sowing from this date → |
| GULKANA AP | Jun 7 | Jul 5 | May 24 | Aug 21 | 73 | Plan sowing from this date → |
| PUNTILLA | Jun 7 | Jun 30 | May 25 | Sep 2 | 83 | Plan sowing from this date → |
| KING SALMON 42 SE | Jun 9 | Jun 22 | May 28 | Sep 11 | 93 | Plan sowing from this date → |
| KIVALINA AP | Jun 10 | Jun 23 | May 24 | Sep 11 | 92 | Plan sowing from this date → |
| SOLDOTNA 5SSW | Jun 11 | Jul 7 | May 26 | Sep 1 | 75 | Plan sowing from this date → |
| COOPER LANDING 5 W | Jun 12 | Jul 2 | May 29 | Sep 1 | 78 | Plan sowing from this date → |
How to read the three dates
Average is the date by which, in half of the years between 1991 and 2020, the last 32 °F night had already happened. Safe is later: only one year in ten saw a frost after it, which is the date to transplant tomatoes and peppers, both killed by a single frost. Early is the risky end, with a frost after it in nine years out of ten.
Every figure is for the weather station, not for your garden. A valley bottom, a north slope or a spot near a lake can run a week or two either way. Cities are warmer than the countryside around them.
Where the numbers come from
The dates are NOAA's U.S. Climate Normals for 1991 to 2020, computed by the National Centers for Environmental Information for every station with thirty years of daily minimum temperatures. ZIP codes are matched to the nearest such station within 150 km using U.S. Census Bureau ZIP Code Tabulation Area centroids. Stations that never see a frost, such as much of south Florida, report no date and are left out.