Heriot Bay, British Columbia climate data is summarized below. Average annual temperatures range from 6.4 °C (low) to 13.2 °C (high). Annual precipitation averages 1369 Millimeters. Heriot Bay is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.96 °C | 5.06 °C | 183 mm |
| February | 1.72 °C | 6.63 °C | 125 mm |
| March | 2.63 °C | 8.56 °C | 161 mm |
| April | 4.46 °C | 12.05 °C | 81 mm |
| May | 8.27 °C | 16.55 °C | 52 mm |
| June | 11 °C | 18.97 °C | 40 mm |
| July | 13.24 °C | 22.88 °C | 31 mm |
| August | 13.14 °C | 22.59 °C | 40 mm |
| September | 10.23 °C | 18.54 °C | 97 mm |
| October | 6.78 °C | 12.82 °C | 184 mm |
| November | 3.23 °C | 8.22 °C | 206 mm |
| December | 0.88 °C | 5.17 °C | 169 mm |
| Annual | 6.4 °C | 13.2 °C | 1369 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |