Trout Creek, Montana has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 1 °C (low) to 14.7 °C (high). Annual precipitation averages 693.9 Millimeters. Trout Creek is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.7 °C | 1.4 °C | 85.09 mm |
| February | -5.2 °C | 4.6 °C | 55.63 mm |
| March | -3.1 °C | 9.1 °C | 64.01 mm |
| April | -0.3 °C | 14.4 °C | 45.47 mm |
| May | 3.5 °C | 20.1 °C | 57.15 mm |
| June | 6.8 °C | 23.4 °C | 62.74 mm |
| July | 8.9 °C | 29.5 °C | 22.61 mm |
| August | 8.4 °C | 29.6 °C | 22.86 mm |
| September | 4.9 °C | 23.5 °C | 29.46 mm |
| October | 1.1 °C | 14.3 °C | 69.6 mm |
| November | -2.3 °C | 5.4 °C | 89.15 mm |
| December | -5.5 °C | 0.9 °C | 90.17 mm |
| Annual | 1 °C | 14.7 °C | 693.94 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |