Babb, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.6 °F (low) to 51.2 °F (high). Annual precipitation averages 26.4 Inches. Babb is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.9 °F | 31.7 °F | 1.77 in. |
| February | 14.1 °F | 34.3 °F | 1.72 in. |
| March | 20.0 °F | 39.7 °F | 2.15 in. |
| April | 28.0 °F | 48.1 °F | 2.47 in. |
| May | 35.3 °F | 57.8 °F | 3.16 in. |
| June | 42.2 °F | 65.4 °F | 4.14 in. |
| July | 46.9 °F | 75.0 °F | 1.67 in. |
| August | 45.2 °F | 75.2 °F | 1.55 in. |
| September | 39.2 °F | 65.0 °F | 2.0 in. |
| October | 31.1 °F | 51.3 °F | 2.08 in. |
| November | 23.2 °F | 38.8 °F | 1.95 in. |
| December | 15.5 °F | 31.7 °F | 1.73 in. |
| Annual | 29.6 °F | 51.2 °F | 26.39 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |