Woodsville, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 13.5 °C (high). Annual precipitation averages 938.8 Millimeters. Woodsville 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 | -14.2 °C | -1.9 °C | 56.9 mm |
| February | -13.9 °C | 0.2 °C | 48.51 mm |
| March | -8.2 °C | 5.3 °C | 58.17 mm |
| April | -0.8 °C | 12.7 °C | 69.6 mm |
| May | 5.8 °C | 20 °C | 85.6 mm |
| June | 11 °C | 24.7 °C | 98.55 mm |
| July | 14.2 °C | 27.7 °C | 98.3 mm |
| August | 13.1 °C | 26.9 °C | 97.28 mm |
| September | 8.9 °C | 22.8 °C | 90.42 mm |
| October | 2.3 °C | 14.8 °C | 98.81 mm |
| November | -2.9 °C | 7.9 °C | 66.29 mm |
| December | -9.1 °C | 1.3 °C | 70.36 mm |
| Annual | 0.5 °C | 13.5 °C | 938.79 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |