Barre, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.1 °C (low) to 12.7 °C (high). Annual precipitation averages 998.7 Millimeters. Barre is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.6 °C | -2.7 °C | 63.75 mm |
| February | -13.9 °C | -0.7 °C | 55.63 mm |
| March | -8.6 °C | 4.2 °C | 65.79 mm |
| April | -1.2 °C | 11.8 °C | 81.28 mm |
| May | 5.3 °C | 19.5 °C | 86.11 mm |
| June | 10.4 °C | 24.3 °C | 108.97 mm |
| July | 13.2 °C | 26.9 °C | 109.47 mm |
| August | 12 °C | 26 °C | 90.93 mm |
| September | 7.9 °C | 22 °C | 84.58 mm |
| October | 1.8 °C | 14.2 °C | 99.06 mm |
| November | -3.4 °C | 6.9 °C | 73.66 mm |
| December | -9.7 °C | 0.3 °C | 79.5 mm |
| Annual | -0.1 °C | 12.7 °C | 998.73 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 |