Hartley Bay, British Columbia climate data is summarized below. Average annual temperatures range from 4.7 °C (low) to 9.3 °C (high). Annual precipitation averages 3204 Millimeters. Hartley Bay is located in USDA Plant Hardiness Zone 8a. 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 | 0.04 °C | 3.81 °C | 356 mm |
| February | 0.18 °C | 4.13 °C | 287 mm |
| March | 0.82 °C | 5.05 °C | 295 mm |
| April | 2.85 °C | 7.95 °C | 235 mm |
| May | 5.75 °C | 11.45 °C | 137 mm |
| June | 8.39 °C | 13.31 °C | 134 mm |
| July | 10.66 °C | 16.1 °C | 106 mm |
| August | 10.81 °C | 16.75 °C | 147 mm |
| September | 8.73 °C | 14 °C | 299 mm |
| October | 5.86 °C | 9.98 °C | 484 mm |
| November | 2.31 °C | 5.84 °C | 387 mm |
| December | -0.46 °C | 3.02 °C | 337 mm |
| Annual | 4.7 °C | 9.3 °C | 3204 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 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |