Montfort, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.1 °C (low) to 13.4 °C (high). Annual precipitation averages 977.9 Millimeters. Montfort is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.1 °C | -3.3 °C | 34.04 mm |
| February | -10.1 °C | -0.8 °C | 35.31 mm |
| March | -3.9 °C | 6.1 °C | 53.09 mm |
| April | 2.3 °C | 13.8 °C | 99.31 mm |
| May | 8.8 °C | 20.2 °C | 115.57 mm |
| June | 14.5 °C | 25.4 °C | 145.8 mm |
| July | 16.7 °C | 27.3 °C | 120.9 mm |
| August | 15.5 °C | 26.4 °C | 104.14 mm |
| September | 10.8 °C | 22.6 °C | 99.06 mm |
| October | 4.3 °C | 15.4 °C | 72.14 mm |
| November | -1.9 °C | 7.2 °C | 55.88 mm |
| December | -8.1 °C | -0.1 °C | 42.67 mm |
| Annual | 3.1 °C | 13.4 °C | 977.91 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |