Walkerville, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 26.9 °F (low) to 50.8 °F (high). Annual precipitation averages 14.5 Inches. Walkerville is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 21 - Jun. 30 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.5 °F | 31.7 °F | 0.75 in. |
| February | 11.6 °F | 33.7 °F | 0.8 in. |
| March | 19.2 °F | 40.5 °F | 0.86 in. |
| April | 23.9 °F | 46.8 °F | 1.52 in. |
| May | 31.8 °F | 56.1 °F | 2.19 in. |
| June | 38.4 °F | 64.8 °F | 2.63 in. |
| July | 44.5 °F | 76.2 °F | 1.05 in. |
| August | 44.2 °F | 75.4 °F | 0.83 in. |
| September | 36.3 °F | 65.0 °F | 1.13 in. |
| October | 27.2 °F | 50.7 °F | 1.13 in. |
| November | 19.5 °F | 38.1 °F | 0.76 in. |
| December | 13.0 °F | 30.1 °F | 0.8 in. |
| Annual | 26.9 °F | 50.8 °F | 14.45 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 21 - Jun. 30 |
| 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 |