Montgomery, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.1 °F (low) to 53.1 °F (high). Annual precipitation averages 50.4 Inches. Montgomery is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.7 °F | 25.0 °F | 3.5 in. |
| February | 7.6 °F | 27.8 °F | 2.93 in. |
| March | 17.7 °F | 37.1 °F | 3.42 in. |
| April | 31.7 °F | 51.8 °F | 3.79 in. |
| May | 43.5 °F | 65.7 °F | 4.36 in. |
| June | 52.3 °F | 74.1 °F | 4.85 in. |
| July | 56.8 °F | 78.2 °F | 5.27 in. |
| August | 55.3 °F | 76.8 °F | 4.89 in. |
| September | 48.0 °F | 69.6 °F | 4.39 in. |
| October | 37.2 °F | 56.3 °F | 5.0 in. |
| November | 26.6 °F | 43.2 °F | 3.86 in. |
| December | 14.9 °F | 31.5 °F | 4.17 in. |
| Annual | 33.1 °F | 53.1 °F | 50.43 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |