Horwood, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 2.1 °C (low) to 6.9 °C (high). Annual precipitation averages 818 Millimeters. 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 | -6.6 °C | -2.04 °C | 31 mm |
| February | -7.31 °C | -2.65 °C | 27 mm |
| March | -5.8 °C | -1.45 °C | 25 mm |
| April | -2.04 °C | 1.96 °C | 44 mm |
| May | 2.04 °C | 7.1 °C | 70 mm |
| June | 6.87 °C | 12.41 °C | 74 mm |
| July | 12.02 °C | 18.09 °C | 88 mm |
| August | 13.04 °C | 18.59 °C | 97 mm |
| September | 9.88 °C | 15.09 °C | 102 mm |
| October | 5.71 °C | 9.79 °C | 103 mm |
| November | 1.07 °C | 5.09 °C | 93 mm |
| December | -3.4 °C | 0.58 °C | 64 mm |
| Annual | 2.1 °C | 6.9 °C | 818 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 |