New Ipswich, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.4 °F (low) to 55.2 °F (high). Annual precipitation averages 52.1 Inches. New Ipswich is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.7 °F | 29.9 °F | 3.83 in. |
| February | 13.9 °F | 33.2 °F | 3.55 in. |
| March | 21.4 °F | 40.6 °F | 4.47 in. |
| April | 32.5 °F | 53.9 °F | 4.34 in. |
| May | 42.8 °F | 65.5 °F | 4.0 in. |
| June | 52.4 °F | 73.9 °F | 4.59 in. |
| July | 57.9 °F | 78.9 °F | 4.4 in. |
| August | 55.7 °F | 77.3 °F | 4.14 in. |
| September | 48.8 °F | 70.3 °F | 4.37 in. |
| October | 38.3 °F | 57.3 °F | 5.34 in. |
| November | 28.8 °F | 45.8 °F | 4.28 in. |
| December | 19.6 °F | 35.3 °F | 4.76 in. |
| Annual | 35.4 °F | 55.2 °F | 52.07 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |