Lisbon, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.4 °C (low) to 13.4 °C (high). Annual precipitation averages 956.6 Millimeters. Lisbon 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 | -13.8 °C | -1.9 °C | 55.12 mm |
| February | -13.7 °C | 0 °C | 48.51 mm |
| March | -7.9 °C | 5.1 °C | 58.42 mm |
| April | -0.9 °C | 12.7 °C | 75.18 mm |
| May | 5.7 °C | 19.9 °C | 86.87 mm |
| June | 10.8 °C | 24.6 °C | 96.01 mm |
| July | 13.9 °C | 27.4 °C | 103.89 mm |
| August | 12.8 °C | 26.7 °C | 96.77 mm |
| September | 8.6 °C | 22.5 °C | 87.88 mm |
| October | 2 °C | 14.6 °C | 104.65 mm |
| November | -3.3 °C | 7.6 °C | 67.82 mm |
| December | -9.2 °C | 1.2 °C | 75.44 mm |
| Annual | 0.4 °C | 13.4 °C | 956.56 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 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |