| 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 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F | |
| Average First Frost Date: | Aug. 11 - Aug. 20 | |
| Average Last Frost Date: | Aug. 1 - Aug. 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 17g - Mid-elevation Sedimentary Mountains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 83414 - Alta, WY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 13 | 19 | 25 | 32 | 39 | 44 | 44 | 36 | 27 | 16 | 9 | 26 |
| Avg Max Temp (°F) | 28 | 32 | 40 | 47 | 57 | 67 | 75 | 75 | 67 | 52 | 35 | 27 | 50 |
| Avg Precip (In.) | 3.47 | 2.71 | 2.7 | 2.61 | 3.67 | 2.14 | 1.84 | 1.64 | 1.88 | 2.34 | 3.27 | 3.37 | 31.63 |