Port Alberni, British Columbia climate data is summarized below. Average annual temperatures range from 42.4 °F (low) to 58.3 °F (high). Annual precipitation averages 32.9 Inches. Port Alberni 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.5 °F | -15 °F | 3022.6 in. |
| February | -17.1 °F | -13.6 °F | 2311.4 in. |
| March | -16.8 °F | -12.5 °F | 2413 in. |
| April | -15.8 °F | -10.1 °F | 939.8 in. |
| May | -13.7 °F | -7.4 °F | 558.8 in. |
| June | -12.1 °F | -6 °F | 482.6 in. |
| July | -10.8 °F | -3.4 °F | 457.2 in. |
| August | -10.8 °F | -3.5 °F | 533.4 in. |
| September | -12.2 °F | -5.9 °F | 1270 in. |
| October | -14.1 °F | -9.8 °F | 3759.2 in. |
| November | -16.3 °F | -13.3 °F | 3479.8 in. |
| December | -17.6 °F | -15.4 °F | 2006.6 in. |
| Annual | 42.4 °F | 58.3 °F | 32.93 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |