Halfmoon Bay, British Columbia climate data is summarized below. Average annual temperatures range from 46.4 °F (low) to 55.7 °F (high). Annual precipitation averages 24.1 Inches. Halfmoon Bay is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Frost Rare through the first frost around Jan. 21 - Jan. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.3 °F | -14.5 °F | 2082.8 in. |
| February | -15.8 °F | -13.7 °F | 1371.6 in. |
| March | -15.3 °F | -12.8 °F | 1600.2 in. |
| April | -14.4 °F | -11.3 °F | 889 in. |
| May | -12.5 °F | -9.2 °F | 558.8 in. |
| June | -11.1 °F | -7.8 °F | 609.6 in. |
| July | -9.7 °F | -5.9 °F | 508 in. |
| August | -9.5 °F | -5.8 °F | 609.6 in. |
| September | -11 °F | -7.4 °F | 1143 in. |
| October | -13 °F | -10.2 °F | 2590.8 in. |
| November | -15 °F | -12.6 °F | 2184.4 in. |
| December | -16.3 °F | -14.4 °F | 1397 in. |
| Annual | 46.4 °F | 55.7 °F | 24.11 in. |
| Average First Frost Date | Jan. 21 - Jan. 31 |
| Average Last Frost Date | Frost Rare |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Moderate Drought |