Witless Bay, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 36.7 °F (low) to 47.2 °F (high). Annual precipitation averages 40.3 Inches. Witless Bay is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -20.9 °F | -17.8 °F | 1752.6 in. |
| February | -21.4 °F | -18.3 °F | 1854.2 in. |
| March | -20.5 °F | -17.8 °F | 1701.8 in. |
| April | -18.6 °F | -15.6 °F | 1981.2 in. |
| May | -16.4 °F | -13 °F | 2032 in. |
| June | -14.1 °F | -10.4 °F | 1803.4 in. |
| July | -11.2 °F | -7.3 °F | 2032 in. |
| August | -10.5 °F | -6.9 °F | 1828.8 in. |
| September | -12.2 °F | -8.6 °F | 2413 in. |
| October | -14.3 °F | -11.5 °F | 2946.4 in. |
| November | -16.6 °F | -13.9 °F | 2870.2 in. |
| December | -19.1 °F | -16.3 °F | 2794 in. |
| Annual | 36.7 °F | 47.2 °F | 40.32 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |