Cook's Harbour, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 31.7 °F (low) to 39 °F (high). Annual precipitation averages 24.9 Inches. Cook's Harbour is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -23.5 °F | -20.4 °F | 381 in. |
| February | -23.6 °F | -20.4 °F | 279.4 in. |
| March | -22.1 °F | -19.4 °F | 584.2 in. |
| April | -19.5 °F | -17.7 °F | 1016 in. |
| May | -17.6 °F | -15.9 °F | 1447.8 in. |
| June | -15.1 °F | -13.1 °F | 1447.8 in. |
| July | -12.5 °F | -10.3 °F | 1651 in. |
| August | -11.6 °F | -9.5 °F | 1625.6 in. |
| September | -13.3 °F | -11.3 °F | 2057.4 in. |
| October | -15.7 °F | -14.1 °F | 2311.4 in. |
| November | -18.5 °F | -16.5 °F | 1854.2 in. |
| December | -21.4 °F | -19 °F | 1397 in. |
| Annual | 31.7 °F | 39 °F | 24.87 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Normal |