Last frost date in Anchorage, Alaska
May 16
Average last frost in spring. In an early year (1 in 10) it's over by May 2; in a late year (1 in 10) it comes after June 9.
September 20
Average first frost in fall. 1 year in 10 it comes by September 4.
Source: NOAA U.S. Climate Normals 1991–2020, station Eagle Rvr Nature Ctr (USC00502642), 4.2 miles from Anchorage, elevation 520 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | May 2 | May 16 | June 9 |
| First frost in fall | Sept 4 | Sept 20 | Oct 3 |
Frost-free days in an average year: 125
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 31 | Sept 6 |
| Frost (32°F) | Every year | May 16 | Sept 20 |
| Hard freeze (28°F) | Every year | May 1 | Oct 1 |
Nights at 32°F or colder in an average year: 204
What to plant now in Anchorage
- Spring planting calendar for an average last frost around May 20 Anchorage: May 16
- Fall planting calendar for an average first frost around September 20 Anchorage: September 20
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Alaska
Updated