Wyoming Frost Dates
Wyoming has a challenging growing season in many places, shaped by altitude, wind, and large swings between warm days and cold nights. Frost risk stays high outside the mildest pockets, especially in mountain basins and open high plains where cold can return unexpectedly.
Look up your exact frost dates
Frost timing shifts across Wyoming with elevation and distance from water. Enter your ZIP code for dates from your nearest weather station.
Wyoming locations
| ZIP | Area | Hardiness zone |
|---|---|---|
| 82054 | Carpenter | 5b |
| 82213 | Glendo | 5a |
| 82214 | Guernsey | 5a |
| 82222 | Lance Creek | 4b |
| 82223 | Lingle | 5a |
| 82244 | Veteran | 5a |
| 82324 | Elk Mountain | 5a |
| 82421 | Deaver | 5a |
| 82422 | Burlington | 5a |
| 82426 | Greybull | 4b |
| 82450 | Cody | 5a |
| 82520 | Atlantic City | 5a |
| 82635 | Edgerton | 5a |
| 82643 | Midwest | 5a |
| 82714 | Hulett | 4b |
| 82729 | Sundance | 4b |
| 82842 | Story | 5a |
| 82932 | Farson | 4a |
| 83112 | Turnerville | 5b |
| 83121 | Kemmerer | 4b |
| 82001 | Cheyenne | 5b |
| 82005 | Warren AFB | 5b |
| 82007 | Cheyenne | 5b |
| 82009 | Ranchettes | 5b |
| 82050 | Albin | 5b |
| 82051 | Rock River | 4a |
| 82052 | Laramie | 5b |
| 82053 | Burns | 5a |
| 82055 | Centennial | 5a |
| 82058 | Esterbrook | 5a |
| 82059 | Cheyenne | 5b |
| 82060 | Hillsdale | 5a |
| 82061 | Ranchettes | 5b |
| 82070 | Woods Landing-Jelm | 4b |
| 82072 | Laramie | 4a |
| 82073 | Laramie | 5b |
| 82081 | LaGrange | 5a |
| 82083 | Rock River | 4b |
| 82084 | Red Feather Lakes | 5b |
| 82190 | West Yellowstone | 4b |
| 82201 | Westview Circle | 5a |
| 82210 | Chugwater | 5a |
| 82212 | Fort Laramie | 5a |
| 82215 | Hartville | 5a |
| 82217 | Hawk Springs | 5a |
| 82218 | Huntley | 5a |
| 82219 | Hartville | 5a |
| 82221 | LaGrange | 5a |
| 82224 | Lost Springs | 5a |
| 82225 | Lance Creek | 5a |
| 82227 | Manville | 5a |
| 82229 | Lost Springs | 5a |
| 82240 | Torrington | 5a |
| 82242 | Van Tassell | 5a |
| 82243 | Veteran | 5a |
| 82301 | Rawlins | 5a |
| 82310 | Jeffrey City | 4b |
| 82321 | Baggs | 4b |
| 82322 | Bairoil | 5b |
| 82323 | Dixon | 4b |
Source: NOAA 1991–2020 U.S. Climate Normals (public domain) and USDA 2023 Plant Hardiness Zone Map. Page updated Aug 4, 2026.