Montague, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 13.2 °C (high). Annual precipitation averages 933.2 Millimeters. Montague is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.5 °C | -0.9 °C | 66.29 mm |
| February | -7.3 °C | 0.3 °C | 51.05 mm |
| March | -3.9 °C | 5.3 °C | 55.63 mm |
| April | 1.7 °C | 12.4 °C | 91.44 mm |
| May | 7.6 °C | 18.8 °C | 93.73 mm |
| June | 12.9 °C | 24 °C | 87.63 mm |
| July | 15.4 °C | 26.2 °C | 82.55 mm |
| August | 15 °C | 25.6 °C | 85.09 mm |
| September | 10.9 °C | 21.9 °C | 81.28 mm |
| October | 5.3 °C | 15.1 °C | 98.81 mm |
| November | 0.2 °C | 7.7 °C | 76.71 mm |
| December | -4.2 °C | 1.8 °C | 62.99 mm |
| Annual | 3.8 °C | 13.2 °C | 933.2 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |