alaska frost dates, county by county.

Aleutians East Borough

Last spring: 05-08 · First fall: 10-21

Aleutians West Census Area

Last spring: 05-09 · First fall: 10-24

Anchorage Municipality

Last spring: 05-01 · First fall: 10-01

Bethel Census Area

Last spring: 05-11 · First fall: 10-01

Bristol Bay Borough

Last spring: 05-08 · First fall: 09-27

Chugach Census Area

Last spring: 04-10 · First fall: 10-27

Copper River Census Area

Last spring: 05-16 · First fall: 09-17

Denali Borough

Last spring: 05-13 · First fall: 09-19

Dillingham Census Area

Last spring: 05-08 · First fall: 09-27

Fairbanks North Star Borough

Last spring: 05-10 · First fall: 09-14

Haines Borough

Last spring: 04-07 · First fall: 10-29

Hoonah-Angoon Census Area

Last spring: 04-20 · First fall: 10-28

Juneau City and Borough

Last spring: 04-11 · First fall: 10-31

Kenai Peninsula Borough

Last spring: 04-23 · First fall: 10-19

Ketchikan Gateway Borough

Last spring: 03-13 · First fall: 11-26

Kodiak Island Borough

Last spring: 04-18 · First fall: 10-17

Kusilvak Census Area

Last spring: 05-11 · First fall: 10-01

Lake and Peninsula Borough

Last spring: 05-23 · First fall: 09-24

Matanuska-Susitna Borough

Last spring: 05-05 · First fall: 09-28

Nome Census Area

Last spring: 05-23 · First fall: 09-19

North Slope Borough

Last spring: 06-08 · First fall: 09-04

Northwest Arctic Borough

Last spring: 05-27 · First fall: 10-03

Petersburg Borough

Last spring: 04-11 · First fall: 11-01

Prince of Wales-Hyder Census Area

Last spring: 04-09 · First fall: 11-05

Sitka City and Borough

Last spring: 04-07 · First fall: 11-10

Skagway Municipality

Last spring: 04-05 · First fall: 11-02

Southeast Fairbanks Census Area

Last spring: 05-28 · First fall: 08-28

Wrangell City and Borough

Last spring: 03-24 · First fall: 11-18

Yakutat City and Borough

Last spring: 04-28 · First fall: 10-12

Yukon-Koyukuk Census Area

Last spring: 05-16 · First fall: 09-08