Moultonborough, New Hampshire has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 35.4 °F (low) to 56.3 °F (high). Annual precipitation averages 47.6 Inches. Moultonborough is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.3 °F | 29.7 °F | 3.18 in. |
| February | 12.1 °F | 32.5 °F | 3.1 in. |
| March | 20.8 °F | 41.6 °F | 3.58 in. |
| April | 32.4 °F | 55.2 °F | 3.77 in. |
| May | 43.7 °F | 68.2 °F | 3.93 in. |
| June | 53.2 °F | 76.2 °F | 4.32 in. |
| July | 58.5 °F | 81.4 °F | 4.65 in. |
| August | 56.9 °F | 79.8 °F | 3.91 in. |
| September | 49.2 °F | 71.7 °F | 3.81 in. |
| October | 38.4 °F | 58.4 °F | 5.19 in. |
| November | 29.1 °F | 46.0 °F | 3.77 in. |
| December | 19.4 °F | 35.3 °F | 4.38 in. |
| Annual | 35.4 °F | 56.3 °F | 47.59 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |