Frost dates · Alaska
Alaska counties by frost timing.
Latest at top, earliest at bottom. In most states this matches the north-to-south gradient.
Sorted by spring frost
Latest → earliest.
North Slope Borough
Spring Jun 8·Fall Sep 488-day season
Limited station data
Southeast Fairbanks Census Area
Spring May 28·Fall Aug 2892-day season
Northwest Arctic Borough
Spring May 27·Fall Oct 3129-day season
Limited station data
Lake and Peninsula Borough
Spring May 23·Fall Sep 24124-day season
Nome Census Area
Spring May 23·Fall Sep 19119-day season
Copper River Census Area
Spring May 16·Fall Sep 17124-day season
Yukon-Koyukuk Census Area
Spring May 16·Fall Sep 8115-day season
Denali Borough
Spring May 13·Fall Sep 19129-day season
Bethel Census Area
Spring May 11·Fall Oct 1143-day season
Limited station data
Kusilvak Census Area
Spring May 11·Fall Oct 1143-day season
Limited station data
Fairbanks North Star Borough
Spring May 10·Fall Sep 14127-day season
Aleutians West Census Area
Spring May 9·Fall Oct 24168-day season
Limited station data
Aleutians East Borough
Spring May 8·Fall Oct 21166-day season
Bristol Bay Borough
Spring May 8·Fall Sep 27142-day season
Dillingham Census Area
Spring May 8·Fall Sep 27142-day season
Limited station data
Matanuska-Susitna Borough
Spring May 5·Fall Sep 28146-day season
Anchorage Municipality
Spring May 1·Fall Oct 1153-day season
Yakutat City and Borough
Spring Apr 28·Fall Oct 12167-day season
Kenai Peninsula Borough
Spring Apr 23·Fall Oct 19179-day season
Hoonah-Angoon Census Area
Spring Apr 20·Fall Oct 28191-day season
Kodiak Island Borough
Spring Apr 18·Fall Oct 17182-day season
Limited station data
Juneau City and Borough
Spring Apr 11·Fall Oct 31203-day season
Petersburg Borough
Spring Apr 11·Fall Nov 1204-day season
Chugach Census Area
Spring Apr 10·Fall Oct 27200-day season
Prince of Wales-Hyder Census Area
Spring Apr 9·Fall Nov 5210-day season
Haines Borough
Spring Apr 7·Fall Oct 29205-day season
Sitka City and Borough
Spring Apr 7·Fall Nov 10217-day season
Skagway Municipality
Spring Apr 5·Fall Nov 2211-day season
Wrangell City and Borough
Spring Mar 24·Fall Nov 18239-day season
Ketchikan Gateway Borough
Spring Mar 13·Fall Nov 26258-day season
Alphabetical · A to Z
- Aleutians East Borough
- Aleutians West Census Area
- Anchorage Municipality
- Bethel Census Area
- Bristol Bay Borough
- Chugach Census Area
- Copper River Census Area
- Denali Borough
- Dillingham Census Area
- Fairbanks North Star Borough
- Haines Borough
- Hoonah-Angoon Census Area
- Juneau City and Borough
- Kenai Peninsula Borough
- Ketchikan Gateway Borough
- Kodiak Island Borough
- Kusilvak Census Area
- Lake and Peninsula Borough
- Matanuska-Susitna Borough
- Nome Census Area
- North Slope Borough
- Northwest Arctic Borough
- Petersburg Borough
- Prince of Wales-Hyder Census Area
- Sitka City and Borough
- Skagway Municipality
- Southeast Fairbanks Census Area
- Wrangell City and Borough
- Yakutat City and Borough
- Yukon-Koyukuk Census Area