Dorset, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.2 °F (low) to 55.7 °F (high). Annual precipitation averages 49.8 Inches. 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 °F | 30.0 °F | 3.47 in. |
| February | 12.0 °F | 32.5 °F | 2.94 in. |
| March | 20.4 °F | 40.9 °F | 3.74 in. |
| April | 31.7 °F | 54.6 °F | 4.01 in. |
| May | 43.0 °F | 66.9 °F | 4.48 in. |
| June | 52.0 °F | 75.1 °F | 5.16 in. |
| July | 56.3 °F | 79.4 °F | 4.78 in. |
| August | 54.4 °F | 78.0 °F | 4.42 in. |
| September | 46.9 °F | 71.2 °F | 4.01 in. |
| October | 36.3 °F | 58.2 °F | 4.9 in. |
| November | 27.7 °F | 45.9 °F | 3.59 in. |
| December | 18.1 °F | 35.3 °F | 4.34 in. |
| Annual | 34.2 °F | 55.7 °F | 49.84 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |