Summerford, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 36.1 °F (low) to 43.6 °F (high). Annual precipitation averages 32.1 Inches. 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 | -21.3 °F | -18.9 °F | 711.2 in. |
| February | -21.7 °F | -19.3 °F | 635 in. |
| March | -20.8 °F | -18.6 °F | 584.2 in. |
| April | -18.8 °F | -16.9 °F | 1117.6 in. |
| May | -16.7 °F | -14.4 °F | 1803.4 in. |
| June | -14 °F | -11.4 °F | 1905 in. |
| July | -11.1 °F | -8.3 °F | 2260.6 in. |
| August | -10.4 °F | -7.8 °F | 2565.4 in. |
| September | -12.1 °F | -9.6 °F | 2641.6 in. |
| October | -14.5 °F | -12.5 °F | 2616.2 in. |
| November | -17.1 °F | -15 °F | 2286 in. |
| December | -19.6 °F | -17.5 °F | 1574.8 in. |
| Annual | 36.1 °F | 43.6 °F | 32.08 in. |
| 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 : -20°F to -15°F |
| Current Drought Conditions | Normal |