Coaticook, Quebec climate data is summarized below. Average annual temperatures range from 32.5 °F (low) to 49.8 °F (high). Annual precipitation averages 10 Inches. Coaticook is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -25.8 °F | -20.6 °F | 0 in. |
| February | -25.7 °F | -20.4 °F | 0 in. |
| March | -22.5 °F | -17 °F | 0 in. |
| April | -18.2 °F | -12.4 °F | 304.8 in. |
| May | -14.5 °F | -8.4 °F | 685.8 in. |
| June | -11.8 °F | -6.1 °F | 1066.8 in. |
| July | -10.2 °F | -4.6 °F | 1625.6 in. |
| August | -10.7 °F | -5.2 °F | 1422.4 in. |
| September | -13.1 °F | -7.4 °F | 584.2 in. |
| October | -16.1 °F | -11.3 °F | 508 in. |
| November | -19.5 °F | -15.1 °F | 228.6 in. |
| December | -23.2 °F | -19 °F | 25.4 in. |
| Annual | 32.5 °F | 49.8 °F | 9.99 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |