Moreton's Harbour, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 2.4 °C (low) to 6.2 °C (high). Annual precipitation averages 818 Millimeters. Moreton's Harbour 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 | -6.14 °C | -2.06 °C | 27 mm |
| February | -6.71 °C | -2.62 °C | 25 mm |
| March | -5.24 °C | -1.56 °C | 22 mm |
| April | -1.81 °C | 1.2 °C | 44 mm |
| May | 1.91 °C | 5.48 °C | 71 mm |
| June | 6.83 °C | 10.73 °C | 76 mm |
| July | 11.98 °C | 16.22 °C | 90 mm |
| August | 13.42 °C | 17.36 °C | 102 mm |
| September | 10.34 °C | 14.35 °C | 106 mm |
| October | 6.11 °C | 9.4 °C | 104 mm |
| November | 1.37 °C | 4.9 °C | 89 mm |
| December | -3.13 °C | 0.47 °C | 62 mm |
| Annual | 2.4 °C | 6.2 °C | 818 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 |