Canterbury, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.9 °F (low) to 60.3 °F (high). Annual precipitation averages 49.1 Inches. Canterbury is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.4 °F | 36.6 °F | 3.77 in. |
| February | 19.7 °F | 39.1 °F | 3.35 in. |
| March | 27.0 °F | 46.8 °F | 4.59 in. |
| April | 36.8 °F | 59.3 °F | 4.46 in. |
| May | 46.7 °F | 69.4 °F | 3.41 in. |
| June | 56.0 °F | 77.5 °F | 3.94 in. |
| July | 62.2 °F | 82.6 °F | 3.71 in. |
| August | 60.2 °F | 81.0 °F | 4.22 in. |
| September | 52.9 °F | 74.1 °F | 4.22 in. |
| October | 42.1 °F | 62.9 °F | 4.77 in. |
| November | 32.3 °F | 52.0 °F | 3.99 in. |
| December | 24.5 °F | 41.8 °F | 4.64 in. |
| Annual | 39.9 °F | 60.3 °F | 49.07 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |