| 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 4b: -25F to -20F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 17w - Townsend Basin |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 59717 - Bozeman, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 24 | 31 | 39 | 46 | 51 | 50 | 41 | 33 | 22 | 14 | 32 |
| Avg Max Temp (°F) | 33 | 39 | 46 | 55 | 64 | 74 | 82 | 82 | 71 | 59 | 42 | 34 | 57 |
| Avg Precip (In.) | .82 | .69 | 1.37 | 1.99 | 3.15 | 2.75 | 1.42 | 1.46 | 1.74 | 1.55 | 1.05 | .78 | 18.76 |