First Frost Dates were calculated using daily climate data from the period between 1991-2020.
Location | Average First Frost Dates |
---|---|
Casper | September 21 - 30 |
Cheyenne | October 1 - 10 |
Cody | October 1 - 10 |
Douglas | September 21 - 30 |
Evanston | September 1 - 10 |
Gillette | September 21 - 30 |
Green River | September 11 - 20 |
Jackson | July 21 - 31 |
Lander | October 1 - 10 |
Laramie | September 1 - 10 |
Powell | September 11 - 20 |
Ranchettes | October 1 - 10 |
Rawlins | September 11 - 20 |
Riverton | September 21 - 30 |
Rock Springs | September 21 - 30 |
Sheridan | September 21 - 30 |
Torrington | September 11 - 20 |