South Brook, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 31.7 °F (low) to 45.2 °F (high). Annual precipitation averages 30.2 Inches. South Brook is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -23.7 °F | -20 °F | 330.2 in. |
| February | -24 °F | -20.2 °F | 533.4 in. |
| March | -22.9 °F | -19.1 °F | 508 in. |
| April | -19.7 °F | -16.1 °F | 1219.2 in. |
| May | -17.2 °F | -12.3 °F | 1854.2 in. |
| June | -14.4 °F | -9.1 °F | 1930.4 in. |
| July | -11.6 °F | -5.9 °F | 2159 in. |
| August | -11.6 °F | -6.3 °F | 2565.4 in. |
| September | -13.7 °F | -8.9 °F | 2641.6 in. |
| October | -16 °F | -12.6 °F | 2641.6 in. |
| November | -18.5 °F | -15.6 °F | 1854.2 in. |
| December | -21.3 °F | -18.4 °F | 1219.2 in. |
| Annual | 31.7 °F | 45.2 °F | 30.15 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |