Cormack, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 30 °F (low) to 43.5 °F (high). Annual precipitation averages 31.3 Inches. Cormack is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -24.3 °F | -20.5 °F | 355.6 in. |
| February | -24.6 °F | -20.6 °F | 203.2 in. |
| March | -23.6 °F | -19.5 °F | 609.6 in. |
| April | -20.2 °F | -16.5 °F | 1193.8 in. |
| May | -17.5 °F | -12.5 °F | 1879.6 in. |
| June | -14.7 °F | -9.4 °F | 1778 in. |
| July | -12.1 °F | -6.7 °F | 2286 in. |
| August | -12.1 °F | -7.1 °F | 2844.8 in. |
| September | -14.2 °F | -9.7 °F | 2971.8 in. |
| October | -16.5 °F | -13.2 °F | 2692.4 in. |
| November | -19 °F | -16.2 °F | 2133.6 in. |
| December | -21.9 °F | -18.9 °F | 1244.6 in. |
| Annual | 30 °F | 43.5 °F | 31.29 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |