| 2023 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 |
| 2012 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 |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Aug. 11 - Aug. 20 |
| 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 59730 - Gallatin Gateway, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 18 | 23 | 30 | 38 | 45 | 50 | 48 | 40 | 32 | 22 | 15 | 31 |
| Avg Max Temp (°F) | 34 | 39 | 46 | 55 | 64 | 73 | 81 | 81 | 71 | 59 | 42 | 34 | 57 |
| Avg Precip (In.) | .66 | .58 | 1.15 | 1.68 | 2.84 | 2.63 | 1.4 | 1.44 | 1.6 | 1.32 | .9 | .65 | 16.84 |