Cormack, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from -1.1 °C (low) to 6.4 °C (high). Annual precipitation averages 795 Millimeters. 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 | -11.82 °C | -4.95 °C | 14 mm |
| February | -12.36 °C | -5.13 °C | 8 mm |
| March | -10.48 °C | -3.08 °C | 24 mm |
| April | -4.37 °C | 2.35 °C | 47 mm |
| May | 0.46 °C | 9.43 °C | 74 mm |
| June | 5.58 °C | 15.13 °C | 70 mm |
| July | 10.16 °C | 20.01 °C | 90 mm |
| August | 10.15 °C | 19.27 °C | 112 mm |
| September | 6.42 °C | 14.52 °C | 117 mm |
| October | 2.33 °C | 8.2 °C | 106 mm |
| November | -2.17 °C | 2.88 °C | 84 mm |
| December | -7.34 °C | -2.03 °C | 49 mm |
| Annual | -1.1 °C | 6.4 °C | 795 mm |
| 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 : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |