Cottlesville, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 2.3 °C (low) to 6.3 °C (high). Annual precipitation averages 815 Millimeters. Cottlesville is located in USDA Plant Hardiness Zone 5a. 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 | -6.38 °C | -2.13 °C | 27 mm |
| February | -6.96 °C | -2.67 °C | 24 mm |
| March | -5.46 °C | -1.55 °C | 21 mm |
| April | -1.88 °C | 1.42 °C | 44 mm |
| May | 1.94 °C | 5.92 °C | 72 mm |
| June | 6.85 °C | 11.19 °C | 76 mm |
| July | 12.02 °C | 16.74 °C | 90 mm |
| August | 13.33 °C | 17.73 °C | 102 mm |
| September | 10.2 °C | 14.57 °C | 105 mm |
| October | 5.96 °C | 9.5 °C | 104 mm |
| November | 1.25 °C | 4.92 °C | 89 mm |
| December | -3.29 °C | 0.44 °C | 61 mm |
| Annual | 2.3 °C | 6.3 °C | 815 mm |
| 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |