Heriot Bay, British Columbia climate data is summarized below. Average annual temperatures range from 43.5 °F (low) to 55.7 °F (high). Annual precipitation averages 53.9 Inches. 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 | -17.2 °F | -15 °F | 4648.2 in. |
| February | -16.8 °F | -14.1 °F | 3175 in. |
| March | -16.3 °F | -13 °F | 4089.4 in. |
| April | -15.3 °F | -11.1 °F | 2057.4 in. |
| May | -13.2 °F | -8.6 °F | 1320.8 in. |
| June | -11.7 °F | -7.2 °F | 1016 in. |
| July | -10.4 °F | -5.1 °F | 787.4 in. |
| August | -10.5 °F | -5.2 °F | 1016 in. |
| September | -12.1 °F | -7.5 °F | 2463.8 in. |
| October | -14 °F | -10.7 °F | 4673.6 in. |
| November | -16 °F | -13.2 °F | 5232.4 in. |
| December | -17.3 °F | -14.9 °F | 4292.6 in. |
| Annual | 43.5 °F | 55.7 °F | 53.88 in. |
| 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 : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |