Hampton Beach, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.4 °C (low) to 14.5 °C (high). Annual precipitation averages 1278.9 Millimeters. Hampton Beach is located in USDA Plant Hardiness Zone 6b. 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 | -7.3 °C | 1.4 °C | 96.77 mm |
| February | -6.7 °C | 2.8 °C | 93.98 mm |
| March | -2.9 °C | 6.7 °C | 119.63 mm |
| April | 2.2 °C | 13.1 °C | 111.76 mm |
| May | 7.5 °C | 18.6 °C | 107.44 mm |
| June | 12.8 °C | 24.1 °C | 114.81 mm |
| July | 16.2 °C | 27.5 °C | 89.66 mm |
| August | 15.6 °C | 26.9 °C | 90.68 mm |
| September | 12.1 °C | 22.7 °C | 101.6 mm |
| October | 6.4 °C | 15.9 °C | 128.27 mm |
| November | 1.1 °C | 9.9 °C | 102.11 mm |
| December | -3.7 °C | 4.3 °C | 122.17 mm |
| Annual | 4.4 °C | 14.5 °C | 1278.88 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 6b : -20.6°C to -17.8°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 |