Frost dates in Alaska

Average last frost dates in Alaska run from May 3 in Juneau to May 16 in Anchorage.

Average frost dates for 4 places in Alaska
PlaceLast frostFirst frost
AnchorageMay 16Sept 20
FairbanksMay 16Sept 6
JuneauMay 3Oct 14
WasillaMay 16Sept 23

Source: NOAA U.S. Climate Normals 1991–2020, nearest station to each place. Places of 10,000+ people (US Census Bureau, 2024 estimates) within 50 miles of a station.

When to plant in Alaska