Victor, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Annual precipitation averages 323.9 Millimeters. Victor is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.7 °C | 2.1 °C | 23.88 mm |
| February | -6.6 °C | 4.8 °C | 22.61 mm |
| March | -3.7 °C | 10.2 °C | 21.34 mm |
| April | -0.7 °C | 14.7 °C | 24.89 mm |
| May | 3.2 °C | 19.9 °C | 38.61 mm |
| June | 6.8 °C | 24.1 °C | 42.42 mm |
| July | 9.2 °C | 30.4 °C | 20.32 mm |
| August | 8.3 °C | 29.7 °C | 20.57 mm |
| September | 4.3 °C | 23.8 °C | 22.1 mm |
| October | -0.4 °C | 15.2 °C | 26.16 mm |
| November | -4.6 °C | 6.3 °C | 30.99 mm |
| December | -7.7 °C | 1.2 °C | 29.97 mm |
| Annual | 0 °C | 15.2 °C | 323.86 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |