Hampton, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.7 °C (low) to 14.5 °C (high). Annual precipitation averages 1309.4 Millimeters. Hampton 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 | -8.7 °C | 1.1 °C | 97.54 mm |
| February | -8 °C | 2.6 °C | 95.76 mm |
| March | -3.7 °C | 6.6 °C | 121.16 mm |
| April | 1.7 °C | 13.4 °C | 113.03 mm |
| May | 7.4 °C | 18.9 °C | 112.78 mm |
| June | 13 °C | 24.3 °C | 119.63 mm |
| July | 16.3 °C | 27.6 °C | 90.42 mm |
| August | 15.5 °C | 26.9 °C | 95.5 mm |
| September | 11.4 °C | 22.8 °C | 103.38 mm |
| October | 4.9 °C | 16 °C | 130.81 mm |
| November | -0.2 °C | 9.8 °C | 103.38 mm |
| December | -5.1 °C | 4.1 °C | 125.98 mm |
| Annual | 3.7 °C | 14.5 °C | 1309.37 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |