Vernon, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.2 °C (low) to 14.7 °C (high). Annual precipitation averages 1274.6 Millimeters. Vernon is located in USDA Plant Hardiness Zone 5b. 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 | -10.9 °C | 0.1 °C | 94.49 mm |
| February | -10.2 °C | 2 °C | 83.57 mm |
| March | -5.2 °C | 6.6 °C | 98.81 mm |
| April | 0.7 °C | 13.9 °C | 100.08 mm |
| May | 6.8 °C | 20.6 °C | 101.6 mm |
| June | 12.2 °C | 25.6 °C | 121.16 mm |
| July | 15 °C | 28.4 °C | 101.09 mm |
| August | 14 °C | 27.5 °C | 111.51 mm |
| September | 9.6 °C | 23.3 °C | 119.89 mm |
| October | 3.3 °C | 15.9 °C | 134.62 mm |
| November | -1.8 °C | 9.2 °C | 100.84 mm |
| December | -6.9 °C | 3.1 °C | 106.93 mm |
| Annual | 2.2 °C | 14.7 °C | 1274.59 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |