| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 15b - Camas Valley | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 59845 - Hot Springs, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 25 | 31 | 39 | 45 | 49 | 48 | 40 | 31 | 24 | 17 | 32 |
| Avg Max Temp (°F) | 33 | 38 | 48 | 58 | 66 | 74 | 83 | 83 | 72 | 58 | 41 | 33 | 57 |
| Avg Precip (In.) | 1.55 | 1.17 | 1.24 | 1.28 | 2.28 | 2.21 | 1.28 | 1.04 | 1.29 | 1.11 | 1.63 | 1.66 | 17.73 |