Starksboro, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.8 °C (low) to 10.3 °C (high). Annual precipitation averages 1418.9 Millimeters. Starksboro is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.5 °C | -4.2 °C | 81.28 mm |
| February | -14.1 °C | -2.5 °C | 75.69 mm |
| March | -9.3 °C | 1.7 °C | 100.33 mm |
| April | -2.3 °C | 9.4 °C | 112.27 mm |
| May | 4.6 °C | 16.7 °C | 140.97 mm |
| June | 9.1 °C | 21.2 °C | 149.1 mm |
| July | 11.9 °C | 23.7 °C | 138.94 mm |
| August | 11.1 °C | 22.7 °C | 128.78 mm |
| September | 7.1 °C | 19 °C | 134.11 mm |
| October | 1.2 °C | 12 °C | 146.3 mm |
| November | -4.2 °C | 4.8 °C | 101.35 mm |
| December | -10.2 °C | -1.1 °C | 109.73 mm |
| Annual | -0.8 °C | 10.3 °C | 1418.85 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°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 |