Port McNeill, British Columbia climate data is summarized below. Average annual temperatures range from 5.9 °C (low) to 10.7 °C (high). Annual precipitation averages 1994 Millimeters. 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 | 2.4 °C | 6.31 °C | 259 mm |
| February | 2.54 °C | 6.98 °C | 176 mm |
| March | 2.59 °C | 7.43 °C | 214 mm |
| April | 3.79 °C | 9.37 °C | 132 mm |
| May | 6.64 °C | 12.16 °C | 76 mm |
| June | 8.77 °C | 14 °C | 74 mm |
| July | 10.78 °C | 16.38 °C | 47 mm |
| August | 10.93 °C | 16.82 °C | 71 mm |
| September | 9.41 °C | 14.74 °C | 139 mm |
| October | 7.03 °C | 11.39 °C | 259 mm |
| November | 3.77 °C | 7.71 °C | 309 mm |
| December | 1.96 °C | 5.41 °C | 238 mm |
| Annual | 5.9 °C | 10.7 °C | 1994 mm |
| 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 : -15°C to -12.2°C |
| Current Drought Conditions | Normal |