| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 25f - Pine Bluffs and Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 82214 - Guernsey, WY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 24 | 31 | 40 | 49 | 55 | 53 | 42 | 32 | 21 | 14 | 33 |
| Avg Max Temp (°F) | 40 | 45 | 53 | 61 | 71 | 82 | 89 | 88 | 79 | 66 | 50 | 42 | 64 |
| Avg Precip (In.) | .31 | .3 | .75 | 1.72 | 2.5 | 1.95 | 1.91 | 1.16 | 1.18 | .92 | .49 | .3 | 13.49 |