| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F | |
| Average First Frost Date: | Aug. 1 - Aug. 10 | |
| Average Last Frost Date: | Jul. 21 - Jul. 31 | |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall | |
| Ecoregion: | 17n - Cold Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 83110 - Afton, WY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 7 | 16 | 23 | 31 | 37 | 42 | 42 | 34 | 24 | 13 | 4 | 23 |
| Avg Max Temp (°F) | 28 | 33 | 41 | 48 | 59 | 69 | 77 | 77 | 67 | 55 | 37 | 28 | 52 |
| Avg Precip (In.) | 1.69 | 1.39 | 1.87 | 2.08 | 2.39 | 1.69 | 1.41 | 1.32 | 1.68 | 1.75 | 1.82 | 1.86 | 20.94 |