Canterbury, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.6 °F (low) to 56.1 °F (high). Annual precipitation averages 49 Inches. Canterbury is located in USDA Plant Hardiness Zone 5b. 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 | 12.6 °F | 30.1 °F | 3.25 in. |
| February | 13.9 °F | 33.1 °F | 3.14 in. |
| March | 21.3 °F | 41.7 °F | 3.61 in. |
| April | 32.5 °F | 54.9 °F | 3.99 in. |
| May | 43.7 °F | 66.9 °F | 4.03 in. |
| June | 53.0 °F | 75.4 °F | 4.61 in. |
| July | 58.3 °F | 80.7 °F | 4.34 in. |
| August | 56.8 °F | 79.0 °F | 4.36 in. |
| September | 49.1 °F | 71.4 °F | 4.23 in. |
| October | 37.9 °F | 58.1 °F | 5.38 in. |
| November | 28.6 °F | 46.1 °F | 3.78 in. |
| December | 18.9 °F | 35.4 °F | 4.28 in. |
| Annual | 35.6 °F | 56.1 °F | 49 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| 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 |