Frost dates · Alaska
When is the first frost in Anchorage?
Anchorage right now
24°FFog
- Today28°F / 25°FClouds and snow
- Tomorrow30°F / 27°FClouds and snow
- Monday34°F / 30°FClouds
Nothing, apparently.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical year, Anchorage’s first frost comes around October 1 and its last around May 5.
One year in ten the first frost comes as early as September 18, and nine years in ten it has arrived by October 14. One year in ten the last frost is over as early as April 24, and nine years in ten it is over by May 15. Anchorage averages about 186 nights a year at 32°F or colder, with about 147 frost-free days in between in a typical year. It’s frost season here, and the last frost usually comes around May 5. That makes it the 9th earliest first frost of the 117 cities we track where it freezes most years.
Last updated
A freeze is in the forecast for the next 48 hours.
Anchorage freezes on more nights than not, which is real commitment from a city that calls itself mild for Alaska.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Frost dates, early, typical and late years
| Early year (1 in 10) | Typical | Late year (1 in 10) | |
|---|---|---|---|
| First frost | September 18 | October 1 | October 14 |
| Last frost | April 24 | May 5 | May 15 |
A frost date here is a night when the official thermometer reads 32°F or colder. Frost on the ground can show up on clear, calm nights a few degrees milder.
Cities with about the same first frost
- Cheyenne, Wyoming: first frost around October 1
- Duluth, Minnesota: first frost around October 1
- Rapid City, South Dakota: first frost around October 1
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00026451.