Bearcreek, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.1 °C (low) to 14.4 °C (high). Annual precipitation averages 429.8 Millimeters. Bearcreek is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10 °C | 2.5 °C | 23.11 mm |
| February | -9.2 °C | 3.3 °C | 21.34 mm |
| March | -5 °C | 8.7 °C | 33.27 mm |
| April | -1.1 °C | 13.1 °C | 54.61 mm |
| May | 3.9 °C | 18 °C | 78.49 mm |
| June | 8.3 °C | 23.6 °C | 53.85 mm |
| July | 11.9 °C | 28.9 °C | 27.18 mm |
| August | 10.9 °C | 28.3 °C | 17.53 mm |
| September | 6.2 °C | 22.5 °C | 36.07 mm |
| October | 0.2 °C | 14.6 °C | 39.37 mm |
| November | -5.2 °C | 7.2 °C | 25.4 mm |
| December | -9.7 °C | 2.3 °C | 19.56 mm |
| Annual | 0.1 °C | 14.4 °C | 429.78 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |