Lewisporte, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 1.1 °C (low) to 7.8 °C (high). Annual precipitation averages 808 Millimeters. Lewisporte 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 | -8.71 °C | -2.81 °C | 25 mm |
| February | -9.35 °C | -3.23 °C | 26 mm |
| March | -7.63 °C | -1.62 °C | 22 mm |
| April | -2.73 °C | 3.17 °C | 47 mm |
| May | 1.93 °C | 9.57 °C | 72 mm |
| June | 6.79 °C | 15.2 °C | 77 mm |
| July | 11.97 °C | 21.13 °C | 88 mm |
| August | 12.28 °C | 20.82 °C | 102 mm |
| September | 8.71 °C | 16.38 °C | 102 mm |
| October | 4.56 °C | 10.2 °C | 104 mm |
| November | 0.03 °C | 4.94 °C | 90 mm |
| December | -4.79 °C | -0.01 °C | 53 mm |
| Annual | 1.1 °C | 7.8 °C | 808 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 |