Port Alberni, British Columbia climate data is summarized below. Average annual temperatures range from 5.8 °C (low) to 14.6 °C (high). Annual precipitation averages 836 Millimeters. 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 | 0.46 °C | 4.98 °C | 119 mm |
| February | 1.19 °C | 7.56 °C | 91 mm |
| March | 1.77 °C | 9.52 °C | 95 mm |
| April | 3.61 °C | 13.75 °C | 37 mm |
| May | 7.37 °C | 18.7 °C | 22 mm |
| June | 10.17 °C | 21.15 °C | 19 mm |
| July | 12.48 °C | 25.84 °C | 18 mm |
| August | 12.63 °C | 25.67 °C | 21 mm |
| September | 10.07 °C | 21.34 °C | 50 mm |
| October | 6.67 °C | 14.29 °C | 148 mm |
| November | 2.67 °C | 8.14 °C | 137 mm |
| December | 0.31 °C | 4.34 °C | 79 mm |
| Annual | 5.8 °C | 14.6 °C | 836 mm |
| 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 : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |