North Troy, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 12 °C (high). Annual precipitation averages 1159.3 Millimeters. North Troy is located in USDA Plant Hardiness Zone 4b. 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 | -14.8 °C | -3.8 °C | 84.33 mm |
| February | -14.2 °C | -2.1 °C | 67.31 mm |
| March | -8.2 °C | 3.1 °C | 76.71 mm |
| April | -0.5 °C | 11.2 °C | 92.46 mm |
| May | 6.2 °C | 18.9 °C | 103.63 mm |
| June | 11 °C | 23.7 °C | 113.03 mm |
| July | 13.6 °C | 26.1 °C | 119.13 mm |
| August | 12.9 °C | 25.3 °C | 112.78 mm |
| September | 8.9 °C | 21.1 °C | 95 mm |
| October | 3.1 °C | 13.6 °C | 113.03 mm |
| November | -2.8 °C | 6.4 °C | 89.66 mm |
| December | -9.6 °C | -0.1 °C | 92.2 mm |
| Annual | 0.5 °C | 12 °C | 1159.27 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 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 |