Poultney, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.7 °F (low) to 57.2 °F (high). Annual precipitation averages 42.2 Inches. Poultney is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.0 °F | 30.1 °F | 2.86 in. |
| February | 11.8 °F | 33.1 °F | 2.24 in. |
| March | 21.9 °F | 42.1 °F | 2.95 in. |
| April | 33.4 °F | 56.8 °F | 3.32 in. |
| May | 44.6 °F | 69.1 °F | 3.63 in. |
| June | 54.2 °F | 77.6 °F | 4.49 in. |
| July | 58.7 °F | 82.2 °F | 4.3 in. |
| August | 57.3 °F | 80.4 °F | 4.2 in. |
| September | 49.4 °F | 73.1 °F | 3.61 in. |
| October | 38.2 °F | 59.7 °F | 4.11 in. |
| November | 29.0 °F | 46.8 °F | 3.16 in. |
| December | 19.4 °F | 35.3 °F | 3.32 in. |
| Annual | 35.7 °F | 57.2 °F | 42.19 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |