Hampton Beach, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40 °F (low) to 58.1 °F (high). Annual precipitation averages 50.4 Inches. 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 | 18.9 °F | 34.5 °F | 3.81 in. |
| February | 20.0 °F | 37.0 °F | 3.7 in. |
| March | 26.7 °F | 44.0 °F | 4.71 in. |
| April | 35.9 °F | 55.5 °F | 4.4 in. |
| May | 45.5 °F | 65.4 °F | 4.23 in. |
| June | 55.1 °F | 75.3 °F | 4.52 in. |
| July | 61.2 °F | 81.5 °F | 3.53 in. |
| August | 60.0 °F | 80.5 °F | 3.57 in. |
| September | 53.8 °F | 72.9 °F | 4.0 in. |
| October | 43.6 °F | 60.7 °F | 5.05 in. |
| November | 34.0 °F | 49.9 °F | 4.02 in. |
| December | 25.3 °F | 39.8 °F | 4.81 in. |
| Annual | 40 °F | 58.1 °F | 50.35 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |