Barnard, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.1 °C (low) to 10.9 °C (high). Annual precipitation averages 1231.7 Millimeters. Barnard 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 | -13.9 °C | -4.3 °C | 83.82 mm |
| February | -13.7 °C | -2.6 °C | 71.63 mm |
| March | -8.7 °C | 2.4 °C | 89.41 mm |
| April | -2.1 °C | 10.6 °C | 96.77 mm |
| May | 5.8 °C | 17.9 °C | 101.35 mm |
| June | 10 °C | 22.1 °C | 127.76 mm |
| July | 13.1 °C | 24.7 °C | 122.43 mm |
| August | 12.2 °C | 24.1 °C | 112.27 mm |
| September | 8.1 °C | 20.1 °C | 102.11 mm |
| October | 2 °C | 12.7 °C | 128.27 mm |
| November | -3.9 °C | 4.9 °C | 91.19 mm |
| December | -10.5 °C | -1.3 °C | 104.65 mm |
| Annual | -0.1 °C | 10.9 °C | 1231.66 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 |