Port McNeill, British Columbia climate data is summarized below. Average annual temperatures range from 42.6 °F (low) to 51.3 °F (high). Annual precipitation averages 78.5 Inches. Port McNeill is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.4 °F | -14.3 °F | 6578.6 in. |
| February | -16.4 °F | -13.9 °F | 4470.4 in. |
| March | -16.3 °F | -13.7 °F | 5435.6 in. |
| April | -15.7 °F | -12.6 °F | 3352.8 in. |
| May | -14.1 °F | -11 °F | 1930.4 in. |
| June | -12.9 °F | -10 °F | 1879.6 in. |
| July | -11.8 °F | -8.7 °F | 1193.8 in. |
| August | -11.7 °F | -8.4 °F | 1803.4 in. |
| September | -12.6 °F | -9.6 °F | 3530.6 in. |
| October | -13.9 °F | -11.5 °F | 6578.6 in. |
| November | -15.7 °F | -13.5 °F | 7848.6 in. |
| December | -16.7 °F | -14.8 °F | 6045.2 in. |
| Annual | 42.6 °F | 51.3 °F | 78.52 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |