| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Sep.1 - Sep. 10 |
| Average Last Frost Date: | Jul. 1 - Jul. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 17w - Townsend Basin |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 59714 - Belgrade, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 14 | 21 | 29 | 37 | 44 | 49 | 48 | 39 | 29 | 18 | 9 | 29 |
| Avg Max Temp (°F) | 30 | 37 | 45 | 55 | 65 | 74 | 83 | 83 | 71 | 58 | 41 | 31 | 56 |
| Avg Precip (In.) | .6 | .54 | 1.02 | 1.41 | 2.5 | 2.42 | 1.2 | 1.16 | 1.44 | 1.11 | .82 | .58 | 14.8 |