North Westminster, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.3 °F (low) to 57 °F (high). Annual precipitation averages 43.3 Inches. North Westminster is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.8 °F | 30.6 °F | 3.17 in. |
| February | 12.1 °F | 34.0 °F | 2.62 in. |
| March | 21.1 °F | 42.1 °F | 3.31 in. |
| April | 32.7 °F | 55.3 °F | 3.28 in. |
| May | 44.0 °F | 67.8 °F | 3.5 in. |
| June | 53.5 °F | 76.6 °F | 3.89 in. |
| July | 58.7 °F | 81.8 °F | 4.05 in. |
| August | 56.7 °F | 80.3 °F | 3.83 in. |
| September | 49.0 °F | 73.0 °F | 3.82 in. |
| October | 37.4 °F | 59.3 °F | 4.65 in. |
| November | 28.3 °F | 47.2 °F | 3.39 in. |
| December | 18.7 °F | 35.6 °F | 3.77 in. |
| Annual | 35.3 °F | 57 °F | 43.28 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |