Port Mellon, British Columbia climate data is summarized below. Average annual temperatures range from 43.3 °F (low) to 54.4 °F (high). Annual precipitation averages 40.9 Inches. Port Mellon is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.6 °F | -15.3 °F | 3149.6 in. |
| February | -17 °F | -14.4 °F | 2311.4 in. |
| March | -16.7 °F | -13.7 °F | 3098.8 in. |
| April | -15.4 °F | -11.6 °F | 1549.4 in. |
| May | -13.4 °F | -9 °F | 990.6 in. |
| June | -11.8 °F | -7.8 °F | 863.6 in. |
| July | -10.1 °F | -5.4 °F | 812.8 in. |
| August | -9.9 °F | -5.3 °F | 863.6 in. |
| September | -11.6 °F | -7.5 °F | 1930.4 in. |
| October | -13.9 °F | -11 °F | 4394.2 in. |
| November | -16.2 °F | -13.8 °F | 3860.8 in. |
| December | -17.7 °F | -15.6 °F | 2565.4 in. |
| Annual | 43.3 °F | 54.4 °F | 40.9 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Moderate Drought |