Bearcreek, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.2 °F (low) to 58 °F (high). Annual precipitation averages 16.9 Inches. 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 | 14.0 °F | 36.5 °F | 0.91 in. |
| February | 15.4 °F | 38.0 °F | 0.84 in. |
| March | 23.0 °F | 47.7 °F | 1.31 in. |
| April | 30.1 °F | 55.5 °F | 2.15 in. |
| May | 39.1 °F | 64.4 °F | 3.09 in. |
| June | 47.0 °F | 74.5 °F | 2.12 in. |
| July | 53.4 °F | 84.0 °F | 1.07 in. |
| August | 51.7 °F | 83.0 °F | 0.69 in. |
| September | 43.1 °F | 72.5 °F | 1.42 in. |
| October | 32.3 °F | 58.2 °F | 1.55 in. |
| November | 22.6 °F | 45.0 °F | 1.0 in. |
| December | 14.6 °F | 36.1 °F | 0.77 in. |
| Annual | 32.2 °F | 58 °F | 16.92 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |