Dorset, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.2 °C (low) to 13.2 °C (high). Annual precipitation averages 1265.9 Millimeters. Dorset is located in USDA Plant Hardiness Zone 5a. 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 | -11.4 °C | -1.1 °C | 88.14 mm |
| February | -11.1 °C | 0.3 °C | 74.68 mm |
| March | -6.4 °C | 4.9 °C | 95 mm |
| April | -0.2 °C | 12.6 °C | 101.85 mm |
| May | 6.1 °C | 19.4 °C | 113.79 mm |
| June | 11.1 °C | 23.9 °C | 131.06 mm |
| July | 13.5 °C | 26.3 °C | 121.41 mm |
| August | 12.4 °C | 25.6 °C | 112.27 mm |
| September | 8.3 °C | 21.8 °C | 101.85 mm |
| October | 2.4 °C | 14.6 °C | 124.46 mm |
| November | -2.4 °C | 7.7 °C | 91.19 mm |
| December | -7.7 °C | 1.8 °C | 110.24 mm |
| Annual | 1.2 °C | 13.2 °C | 1265.94 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |