St. Brendan's, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 2.2 °C (low) to 7.1 °C (high). Annual precipitation averages 894 Millimeters. St. Brendan's is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.73 °C | -1.53 °C | 39 mm |
| February | -7.39 °C | -2.22 °C | 38 mm |
| March | -5.56 °C | -1.01 °C | 36 mm |
| April | -1.61 °C | 2.42 °C | 53 mm |
| May | 2.29 °C | 7.11 °C | 74 mm |
| June | 6.86 °C | 11.94 °C | 75 mm |
| July | 11.95 °C | 17.58 °C | 85 mm |
| August | 13.07 °C | 18.35 °C | 92 mm |
| September | 9.93 °C | 15.27 °C | 105 mm |
| October | 5.85 °C | 10.11 °C | 112 mm |
| November | 1.36 °C | 5.61 °C | 107 mm |
| December | -3.27 °C | 1.25 °C | 78 mm |
| Annual | 2.2 °C | 7.1 °C | 894 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |