wyoming frost dates, county by county.

Albany County

Last spring: 05-07 · First fall: 10-04

Big Horn County

Last spring: 05-02 · First fall: 10-03

Campbell County

Last spring: 05-02 · First fall: 10-10

Carbon County

Last spring: 05-17 · First fall: 09-26

Converse County

Last spring: 05-08 · First fall: 10-01

Crook County

Last spring: 05-06 · First fall: 10-03

Fremont County

Last spring: 05-03 · First fall: 10-07

Goshen County

Last spring: 05-09 · First fall: 10-01

Hot Springs County

Last spring: 04-23 · First fall: 10-15

Johnson County

Last spring: 05-08 · First fall: 09-30

Laramie County

Last spring: 05-09 · First fall: 10-01

Lincoln County

Last spring: 05-24 · First fall: 09-15

Natrona County

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

Niobrara County

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

Park County

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

Platte County

Last spring: 05-09 · First fall: 10-01

Sheridan County

Last spring: 05-07 · First fall: 10-03

Sublette County

Last spring: 06-05 · First fall: 09-04

Sweetwater County

Last spring: 05-07 · First fall: 10-05

Teton County

Last spring: — · First fall: —

Uinta County

Last spring: 05-30 · First fall: 09-20

Washakie County

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

Weston County

Last spring: 05-09 · First fall: 10-02