Wilmot, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.2 °C (low) to 12.8 °C (high). Annual precipitation averages 1205.7 Millimeters. Wilmot is located in USDA Plant Hardiness Zone 5a. 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 | -12 °C | -1.8 °C | 80.01 mm |
| February | -11.3 °C | -0.1 °C | 75.69 mm |
| March | -6.8 °C | 4.6 °C | 87.88 mm |
| April | -0.3 °C | 12.1 °C | 94.74 mm |
| May | 5.9 °C | 19.1 °C | 96.01 mm |
| June | 11.1 °C | 23.7 °C | 115.32 mm |
| July | 14.1 °C | 26.3 °C | 116.84 mm |
| August | 12.9 °C | 25.4 °C | 101.35 mm |
| September | 8.7 °C | 21.4 °C | 98.81 mm |
| October | 2.7 °C | 14 °C | 134.87 mm |
| November | -2.4 °C | 7.4 °C | 98.81 mm |
| December | -7.7 °C | 1.3 °C | 105.41 mm |
| Annual | 1.2 °C | 12.8 °C | 1205.74 mm |
| 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |