Rollinsford, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.8 °C (low) to 14.3 °C (high). Annual precipitation averages 1165.9 Millimeters. Rollinsford 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 | -9.8 °C | 0.6 °C | 80.77 mm |
| February | -8.9 °C | 2.1 °C | 81.28 mm |
| March | -4.4 °C | 6.3 °C | 101.35 mm |
| April | 1.2 °C | 13.1 °C | 107.19 mm |
| May | 6.8 °C | 19.1 °C | 92.96 mm |
| June | 12 °C | 24.3 °C | 104.39 mm |
| July | 15.2 °C | 27.4 °C | 95.5 mm |
| August | 14.3 °C | 26.9 °C | 87.63 mm |
| September | 10.1 °C | 22.8 °C | 92.2 mm |
| October | 3.7 °C | 15.9 °C | 118.11 mm |
| November | -1.1 °C | 9.6 °C | 96.27 mm |
| December | -6 °C | 3.4 °C | 108.2 mm |
| Annual | 2.8 °C | 14.3 °C | 1165.85 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |