Proctorsville, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.3 °C (low) to 13.1 °C (high). Annual precipitation averages 1219.7 Millimeters. Proctorsville 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. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.8 °C | -1.4 °C | 88.9 mm |
| February | -12.6 °C | 0.3 °C | 69.09 mm |
| March | -7.7 °C | 4.8 °C | 99.82 mm |
| April | -1.2 °C | 12.2 °C | 97.54 mm |
| May | 5.3 °C | 19.5 °C | 104.39 mm |
| June | 10.4 °C | 23.8 °C | 122.43 mm |
| July | 13 °C | 26.6 °C | 108.46 mm |
| August | 11.9 °C | 25.7 °C | 100.84 mm |
| September | 7.7 °C | 21.9 °C | 104.14 mm |
| October | 1.6 °C | 14.4 °C | 123.95 mm |
| November | -3.3 °C | 7.6 °C | 96.01 mm |
| December | -8.6 °C | 1.4 °C | 104.14 mm |
| Annual | 0.3 °C | 13.1 °C | 1219.71 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 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 |