Maxville, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.7 °C (low) to 12.7 °C (high). Annual precipitation averages 383.6 Millimeters. Maxville 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.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.8 °C | 0.6 °C | 19.05 mm |
| February | -10.2 °C | 2.3 °C | 18.54 mm |
| March | -6.7 °C | 7.1 °C | 22.35 mm |
| April | -3.4 °C | 11.3 °C | 36.58 mm |
| May | 0.5 °C | 16.6 °C | 58.42 mm |
| June | 4.1 °C | 20.8 °C | 64.52 mm |
| July | 6.7 °C | 27.2 °C | 29.21 mm |
| August | 5.7 °C | 26.9 °C | 26.42 mm |
| September | 2.1 °C | 21.3 °C | 31.24 mm |
| October | -2.7 °C | 13.1 °C | 28.96 mm |
| November | -7.3 °C | 4.8 °C | 25.15 mm |
| December | -10.9 °C | -0.1 °C | 23.11 mm |
| Annual | -2.7 °C | 12.7 °C | 383.55 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |