Kingston, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.4 °C (low) to 14.9 °C (high). Annual precipitation averages 1208 Millimeters. Kingston 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 | -9.1 °C | 1.3 °C | 86.36 mm |
| February | -8.2 °C | 2.8 °C | 84.84 mm |
| March | -3.9 °C | 7 °C | 111 mm |
| April | 1.7 °C | 14.1 °C | 106.43 mm |
| May | 7.3 °C | 19.9 °C | 98.55 mm |
| June | 12.8 °C | 24.9 °C | 106.43 mm |
| July | 15.9 °C | 28.1 °C | 91.19 mm |
| August | 14.9 °C | 27.3 °C | 90.93 mm |
| September | 10.7 °C | 23.2 °C | 98.04 mm |
| October | 4.3 °C | 16.3 °C | 123.95 mm |
| November | -0.7 °C | 10.1 °C | 97.03 mm |
| December | -5.5 °C | 4.2 °C | 113.28 mm |
| Annual | 3.4 °C | 14.9 °C | 1208.03 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 |