Montague, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.7 °C (low) to 14.9 °C (high). Annual precipitation averages 1234.2 Millimeters. Montague is located in USDA Plant Hardiness Zone 6a. 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 | -10.4 °C | 0.4 °C | 89.66 mm |
| February | -9.7 °C | 2.3 °C | 79.5 mm |
| March | -4.8 °C | 7 °C | 95.5 mm |
| April | 1.1 °C | 14.4 °C | 98.81 mm |
| May | 7.2 °C | 20.8 °C | 94.49 mm |
| June | 12.6 °C | 25.6 °C | 116.33 mm |
| July | 15.6 °C | 28.5 °C | 107.95 mm |
| August | 14.5 °C | 27.6 °C | 112.01 mm |
| September | 10.1 °C | 23.5 °C | 115.06 mm |
| October | 3.7 °C | 16 °C | 125.22 mm |
| November | -1.7 °C | 9.3 °C | 92.96 mm |
| December | -6.4 °C | 3.4 °C | 106.68 mm |
| Annual | 2.7 °C | 14.9 °C | 1234.17 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |