Sutton, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.9 °F (low) to 55.3 °F (high). Annual precipitation averages 49.5 Inches. Sutton is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.2 °F | 29.3 °F | 3.38 in. |
| February | 13.7 °F | 32.3 °F | 3.09 in. |
| March | 21.4 °F | 40.6 °F | 3.76 in. |
| April | 32.8 °F | 53.9 °F | 3.97 in. |
| May | 43.8 °F | 66.1 °F | 3.93 in. |
| June | 53.7 °F | 74.7 °F | 4.61 in. |
| July | 59.0 °F | 79.4 °F | 4.53 in. |
| August | 56.9 °F | 77.8 °F | 4.18 in. |
| September | 49.5 °F | 70.7 °F | 4.09 in. |
| October | 38.9 °F | 57.5 °F | 5.39 in. |
| November | 29.0 °F | 45.9 °F | 3.99 in. |
| December | 19.7 °F | 34.8 °F | 4.53 in. |
| Annual | 35.9 °F | 55.3 °F | 49.45 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |