Essex Junction, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.4 °C (low) to 12.9 °C (high). Annual precipitation averages 1064.8 Millimeters. Essex Junction is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.4 °C | -2.4 °C | 62.23 mm |
| February | -11.6 °C | -0.9 °C | 49.02 mm |
| March | -6.2 °C | 4.1 °C | 66.8 mm |
| April | 1.1 °C | 12.1 °C | 86.87 mm |
| May | 7.7 °C | 19.6 °C | 99.57 mm |
| June | 13.2 °C | 24.4 °C | 111.25 mm |
| July | 15.9 °C | 26.9 °C | 118.11 mm |
| August | 15 °C | 26.2 °C | 107.44 mm |
| September | 10.6 °C | 21.9 °C | 104.9 mm |
| October | 4.4 °C | 14.3 °C | 106.68 mm |
| November | -1.1 °C | 7.5 °C | 77.47 mm |
| December | -7.4 °C | 1.1 °C | 74.42 mm |
| Annual | 2.4 °C | 12.9 °C | 1064.76 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |