Greensboro, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.8 °C (low) to 10.7 °C (high). Annual precipitation averages 1210.1 Millimeters. Greensboro is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.6 °C | -4.7 °C | 78.99 mm |
| February | -15.1 °C | -2.8 °C | 67.82 mm |
| March | -9.4 °C | 2.1 °C | 78.74 mm |
| April | -1.7 °C | 9.7 °C | 94.49 mm |
| May | 4.8 °C | 17.6 °C | 108.97 mm |
| June | 9.7 °C | 22.3 °C | 123.95 mm |
| July | 12.4 °C | 24.9 °C | 121.92 mm |
| August | 11.3 °C | 24.1 °C | 118.87 mm |
| September | 7.2 °C | 19.9 °C | 100.08 mm |
| October | 1.5 °C | 12.2 °C | 122.43 mm |
| November | -4.3 °C | 4.8 °C | 91.44 mm |
| December | -10.7 °C | -1.4 °C | 102.36 mm |
| Annual | -0.8 °C | 10.7 °C | 1210.06 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°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 |