Canaan, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.7 °F (low) to 59.3 °F (high). Annual precipitation averages 46.6 Inches. Canaan is located in USDA Plant Hardiness Zone 6a. 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 | 14.1 °F | 33.8 °F | 3.12 in. |
| February | 15.7 °F | 37.0 °F | 2.58 in. |
| March | 23.7 °F | 45.0 °F | 3.48 in. |
| April | 33.9 °F | 59.0 °F | 3.53 in. |
| May | 44.7 °F | 70.5 °F | 3.72 in. |
| June | 53.9 °F | 78.1 °F | 4.72 in. |
| July | 58.9 °F | 83.2 °F | 4.67 in. |
| August | 57.3 °F | 81.2 °F | 4.37 in. |
| September | 49.5 °F | 73.5 °F | 4.39 in. |
| October | 38.6 °F | 61.5 °F | 4.78 in. |
| November | 29.4 °F | 49.7 °F | 3.34 in. |
| December | 21.1 °F | 38.6 °F | 3.9 in. |
| Annual | 36.7 °F | 59.3 °F | 46.6 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |