Trepassey, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 3.4 °C (low) to 8.4 °C (high). Annual precipitation averages 1186 Millimeters. Trepassey is located in USDA Plant Hardiness Zone . 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 | -4.5 °C | 0.74 °C | 93 mm |
| February | -5.39 °C | -0.36 °C | 90 mm |
| March | -4.03 °C | 0.5 °C | 87 mm |
| April | -0.84 °C | 4.06 °C | 100 mm |
| May | 3.08 °C | 8.4 °C | 88 mm |
| June | 7.08 °C | 12.5 °C | 84 mm |
| July | 12.05 °C | 17.28 °C | 92 mm |
| August | 13.75 °C | 18.91 °C | 76 mm |
| September | 10.87 °C | 16.31 °C | 99 mm |
| October | 7.05 °C | 11.65 °C | 126 mm |
| November | 2.9 °C | 7.42 °C | 130 mm |
| December | -1.29 °C | 3.4 °C | 121 mm |
| Annual | 3.4 °C | 8.4 °C | 1186 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | |
| Current Drought Conditions | Normal |