Salisbury, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.3 °C (low) to 13.5 °C (high). Annual precipitation averages 1220.5 Millimeters. Salisbury is located in USDA Plant Hardiness Zone 5b. 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 | -11.8 °C | -1.1 °C | 82.8 mm |
| February | -11.1 °C | 0.8 °C | 77.98 mm |
| March | -6.6 °C | 5.3 °C | 91.44 mm |
| April | -0.3 °C | 12.8 °C | 97.79 mm |
| May | 5.9 °C | 19.7 °C | 96.77 mm |
| June | 11.1 °C | 24.4 °C | 113.28 mm |
| July | 14.2 °C | 27.3 °C | 113.28 mm |
| August | 13 °C | 26.3 °C | 100.84 mm |
| September | 8.8 °C | 22.2 °C | 99.06 mm |
| October | 2.5 °C | 14.8 °C | 133.6 mm |
| November | -2.4 °C | 8.1 °C | 101.09 mm |
| December | -7.8 °C | 1.9 °C | 112.52 mm |
| Annual | 1.3 °C | 13.5 °C | 1220.45 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |