Claremont, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35 °F (low) to 56.6 °F (high). Annual precipitation averages 41.9 Inches. Claremont 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.3 °F | 29.7 °F | 2.77 in. |
| February | 11.6 °F | 33.3 °F | 2.37 in. |
| March | 20.7 °F | 41.4 °F | 2.94 in. |
| April | 32.5 °F | 55.2 °F | 3.35 in. |
| May | 44.1 °F | 67.7 °F | 3.32 in. |
| June | 53.2 °F | 76.3 °F | 4.05 in. |
| July | 58.4 °F | 81.7 °F | 4.06 in. |
| August | 56.6 °F | 80.1 °F | 3.89 in. |
| September | 48.8 °F | 73.0 °F | 3.77 in. |
| October | 37.3 °F | 59.0 °F | 4.8 in. |
| November | 28.2 °F | 46.6 °F | 3.14 in. |
| December | 18.3 °F | 34.9 °F | 3.43 in. |
| Annual | 35 °F | 56.6 °F | 41.89 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |