Horwood, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 35.8 °F (low) to 44.4 °F (high). Annual precipitation averages 32.2 Inches. Horwood 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 | -21.4 °F | -18.9 °F | 787.4 in. |
| February | -21.8 °F | -19.3 °F | 685.8 in. |
| March | -21 °F | -18.6 °F | 635 in. |
| April | -18.9 °F | -16.7 °F | 1117.6 in. |
| May | -16.6 °F | -13.8 °F | 1778 in. |
| June | -14 °F | -10.9 °F | 1879.6 in. |
| July | -11.1 °F | -7.7 °F | 2235.2 in. |
| August | -10.5 °F | -7.5 °F | 2463.8 in. |
| September | -12.3 °F | -9.4 °F | 2590.8 in. |
| October | -14.6 °F | -12.3 °F | 2616.2 in. |
| November | -17.2 °F | -15 °F | 2362.2 in. |
| December | -19.7 °F | -17.5 °F | 1625.6 in. |
| Annual | 35.8 °F | 44.4 °F | 32.2 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 |