Glenwood, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 0.5 °C (low) to 8.3 °C (high). Annual precipitation averages 809 Millimeters. Glenwood 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 | -9.72 °C | -2.89 °C | 27 mm |
| February | -10.48 °C | -3.28 °C | 31 mm |
| March | -8.53 °C | -1.52 °C | 24 mm |
| April | -3.13 °C | 3.78 °C | 46 mm |
| May | 1.73 °C | 10.76 °C | 72 mm |
| June | 6.64 °C | 16.3 °C | 77 mm |
| July | 11.77 °C | 22.21 °C | 85 mm |
| August | 11.72 °C | 21.56 °C | 96 mm |
| September | 7.98 °C | 16.86 °C | 101 mm |
| October | 3.86 °C | 10.37 °C | 104 mm |
| November | -0.53 °C | 5.07 °C | 92 mm |
| December | -5.44 °C | 0.03 °C | 54 mm |
| Annual | 0.5 °C | 8.3 °C | 809 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 |