Barnet, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.2 °C (low) to 12.6 °C (high). Annual precipitation averages 1007.4 Millimeters. Barnet is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.6 °C | -2.8 °C | 63.25 mm |
| February | -14.2 °C | -0.8 °C | 52.07 mm |
| March | -8.4 °C | 4.4 °C | 64.26 mm |
| April | -1.1 °C | 11.7 °C | 79.5 mm |
| May | 5.6 °C | 19.1 °C | 101.6 mm |
| June | 10.8 °C | 23.8 °C | 96.52 mm |
| July | 13.8 °C | 26.6 °C | 100.58 mm |
| August | 12.6 °C | 25.8 °C | 106.43 mm |
| September | 8.4 °C | 21.7 °C | 96.52 mm |
| October | 2.2 °C | 14.1 °C | 101.35 mm |
| November | -3.1 °C | 7 °C | 70.1 mm |
| December | -9.4 °C | 0.4 °C | 75.18 mm |
| Annual | 0.2 °C | 12.6 °C | 1007.36 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |