| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 3a: -40°F to -35°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 2b: -45F to -40F | |
| Average First Frost Date: | Aug. 11 - Aug. 20 | |
| Average Last Frost Date: | Jun. 11 - Jun. 20 | |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall | |
| Ecoregion: | 17j - Yellowstone Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 59758 - West Yellowstone, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 5 | 12 | 21 | 30 | 37 | 41 | 39 | 31 | 22 | 12 | 2 | 21 |
| Avg Max Temp (°F) | 24 | 31 | 38 | 47 | 58 | 69 | 78 | 77 | 66 | 52 | 33 | 24 | 50 |
| Avg Precip (In.) | 2.38 | 2.04 | 2.21 | 1.6 | 2.1 | 2.22 | 1.75 | 1.38 | 1.44 | 1.3 | 1.99 | 2.57 | 23 |