Lowell, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.2 °F (low) to 52.3 °F (high). Annual precipitation averages 50.4 Inches. Lowell 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 | 4.0 °F | 24.2 °F | 3.45 in. |
| February | 5.0 °F | 27.4 °F | 3.11 in. |
| March | 15.3 °F | 36.6 °F | 3.36 in. |
| April | 30.4 °F | 50.8 °F | 4.05 in. |
| May | 41.9 °F | 64.6 °F | 4.46 in. |
| June | 50.4 °F | 73.1 °F | 4.97 in. |
| July | 55.0 °F | 77.5 °F | 4.71 in. |
| August | 53.1 °F | 76.0 °F | 4.51 in. |
| September | 46.6 °F | 68.8 °F | 3.8 in. |
| October | 34.8 °F | 55.4 °F | 5.32 in. |
| November | 24.7 °F | 42.2 °F | 4.42 in. |
| December | 13.6 °F | 30.5 °F | 4.23 in. |
| Annual | 31.2 °F | 52.3 °F | 50.39 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 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |