| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5a: -20°F to -15°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: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer | |
| Ecoregion: | 15k - Clark Fork Valley and Mountains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 59874 - Trout Creek, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 22 | 26 | 32 | 38 | 44 | 47 | 47 | 40 | 33 | 28 | 20 | 33 |
| Avg Max Temp (°F) | 33 | 40 | 48 | 58 | 67 | 74 | 82 | 83 | 73 | 58 | 41 | 33 | 57 |
| Avg Precip (In.) | 3.7 | 2.79 | 2.24 | 1.83 | 2.37 | 2.25 | 1.4 | 1.34 | 1.42 | 1.97 | 3.89 | 3.91 | 29.12 |