Danville, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.3 °C (low) to 14.9 °C (high). Annual precipitation averages 1196.1 Millimeters. Danville is located in USDA Plant Hardiness Zone 6a. 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 | -9.2 °C | 1.2 °C | 83.31 mm |
| February | -8.3 °C | 2.7 °C | 83.31 mm |
| March | -4 °C | 6.9 °C | 108.2 mm |
| April | 1.7 °C | 14.1 °C | 105.41 mm |
| May | 7.4 °C | 19.9 °C | 99.57 mm |
| June | 12.7 °C | 24.9 °C | 104.9 mm |
| July | 15.9 °C | 28.1 °C | 90.17 mm |
| August | 14.9 °C | 27.3 °C | 92.46 mm |
| September | 10.7 °C | 23.2 °C | 97.54 mm |
| October | 4.3 °C | 16.3 °C | 123.7 mm |
| November | -0.7 °C | 10.1 °C | 96.77 mm |
| December | -5.6 °C | 4.1 °C | 110.74 mm |
| Annual | 3.3 °C | 14.9 °C | 1196.08 mm |
| 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |