Summerford, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 2.3 °C (low) to 6.5 °C (high). Annual precipitation averages 815 Millimeters. Summerford 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 | -2.08 °C | 28 mm |
| February | -7 °C | -2.65 °C | 25 mm |
| March | -5.5 °C | -1.52 °C | 23 mm |
| April | -1.9 °C | 1.53 °C | 44 mm |
| May | 1.98 °C | 6.17 °C | 71 mm |
| June | 6.85 °C | 11.44 °C | 75 mm |
| July | 12.03 °C | 17 °C | 89 mm |
| August | 13.28 °C | 17.9 °C | 101 mm |
| September | 10.15 °C | 14.68 °C | 104 mm |
| October | 5.94 °C | 9.57 °C | 103 mm |
| November | 1.23 °C | 4.97 °C | 90 mm |
| December | -3.27 °C | 0.49 °C | 62 mm |
| Annual | 2.3 °C | 6.5 °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 |