Jeffersonville, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.4 °C (low) to 12.5 °C (high). Annual precipitation averages 1109.5 Millimeters. Jeffersonville is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.6 °C | -2.9 °C | 69.09 mm |
| February | -12.8 °C | -1.3 °C | 54.1 mm |
| March | -7.2 °C | 3.7 °C | 71.88 mm |
| April | 0.1 °C | 11.7 °C | 89.15 mm |
| May | 6.9 °C | 19.2 °C | 108.2 mm |
| June | 12.1 °C | 23.9 °C | 111.51 mm |
| July | 14.8 °C | 26.4 °C | 118.11 mm |
| August | 13.8 °C | 25.8 °C | 110.74 mm |
| September | 9.8 °C | 21.6 °C | 104.9 mm |
| October | 3.6 °C | 14.1 °C | 108.71 mm |
| November | -2.1 °C | 7.1 °C | 78.74 mm |
| December | -8.4 °C | 0.6 °C | 84.33 mm |
| Annual | 1.4 °C | 12.5 °C | 1109.46 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°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 |