Wells River, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.7 °F (low) to 55.7 °F (high). Annual precipitation averages 38 Inches. Wells River 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.2 °F | 27.7 °F | 2.4 in. |
| February | 6.7 °F | 31.6 °F | 1.98 in. |
| March | 17.1 °F | 40.9 °F | 2.45 in. |
| April | 30.3 °F | 54.2 °F | 2.86 in. |
| May | 42.2 °F | 67.4 °F | 3.54 in. |
| June | 51.5 °F | 75.8 °F | 3.84 in. |
| July | 57.1 °F | 81.2 °F | 3.94 in. |
| August | 55.0 °F | 79.8 °F | 3.95 in. |
| September | 47.5 °F | 72.2 °F | 3.61 in. |
| October | 36.0 °F | 58.2 °F | 3.96 in. |
| November | 26.7 °F | 45.6 °F | 2.68 in. |
| December | 15.6 °F | 33.7 °F | 2.83 in. |
| Annual | 32.7 °F | 55.7 °F | 38.04 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 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |