Heart's Delight-Islington, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 37.1 °F (low) to 46.5 °F (high). Annual precipitation averages 38.3 Inches. Heart's Delight-Islington is located in USDA Plant Hardiness Zone 5b. 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 | -21 °F | -17.9 °F | 1574.8 in. |
| February | -21.4 °F | -18.5 °F | 1574.8 in. |
| March | -20.4 °F | -17.9 °F | 1473.2 in. |
| April | -18.4 °F | -15.7 °F | 1727.2 in. |
| May | -16.2 °F | -13.1 °F | 2006.6 in. |
| June | -13.9 °F | -10.7 °F | 1701.8 in. |
| July | -11.1 °F | -7.7 °F | 1905 in. |
| August | -10.3 °F | -7.2 °F | 2032 in. |
| September | -12 °F | -8.8 °F | 2590.8 in. |
| October | -14.2 °F | -11.6 °F | 2895.6 in. |
| November | -16.6 °F | -14 °F | 2692.4 in. |
| December | -19.1 °F | -16.4 °F | 2514.6 in. |
| Annual | 37.1 °F | 46.5 °F | 38.27 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |