Beaver Creek, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.7 °C (low) to 13.6 °C (high). Annual precipitation averages 308.6 Millimeters. Beaver Creek is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.8 °C | -2.1 °C | 10.92 mm |
| February | -12.2 °C | 0.2 °C | 8.64 mm |
| March | -6.8 °C | 6.4 °C | 12.19 mm |
| April | -0.7 °C | 13.8 °C | 28.96 mm |
| May | 4.8 °C | 19.3 °C | 45.47 mm |
| June | 9.6 °C | 23.9 °C | 66.55 mm |
| July | 12.5 °C | 29.6 °C | 39.62 mm |
| August | 11.4 °C | 29.2 °C | 23.88 mm |
| September | 6.1 °C | 22.9 °C | 27.43 mm |
| October | -0.5 °C | 14.4 °C | 20.07 mm |
| November | -6.6 °C | 5.7 °C | 15.24 mm |
| December | -11.9 °C | 0.1 °C | 9.65 mm |
| Annual | -0.7 °C | 13.6 °C | 308.62 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |