Barton, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.8 °C (low) to 11.2 °C (high). Annual precipitation averages 1165.9 Millimeters. Barton is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.1 °C | -4.3 °C | 79.5 mm |
| February | -15.3 °C | -2.6 °C | 66.55 mm |
| March | -9.7 °C | 2.4 °C | 76.45 mm |
| April | -1.8 °C | 10.3 °C | 89.92 mm |
| May | 4.8 °C | 18.1 °C | 105.16 mm |
| June | 9.9 °C | 22.7 °C | 119.13 mm |
| July | 12.6 °C | 25.3 °C | 118.36 mm |
| August | 11.7 °C | 24.5 °C | 115.32 mm |
| September | 7.4 °C | 20.3 °C | 97.28 mm |
| October | 1.4 °C | 12.7 °C | 116.08 mm |
| November | -4.2 °C | 5.4 °C | 86.87 mm |
| December | -10.7 °C | -0.9 °C | 95.25 mm |
| Annual | -0.8 °C | 11.2 °C | 1165.87 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°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 |