New Westminster, British Columbia climate data is summarized below. Average annual temperatures range from 6.8 °C (low) to 14.8 °C (high). Annual precipitation averages 844 Millimeters. New Westminster is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.04 °C | 5.88 °C | 109 mm |
| February | 2.5 °C | 8.61 °C | 71 mm |
| March | 3.3 °C | 10.27 °C | 105 mm |
| April | 5.02 °C | 14.22 °C | 52 mm |
| May | 8.79 °C | 18.78 °C | 38 mm |
| June | 11.34 °C | 20.93 °C | 31 mm |
| July | 13.82 °C | 24.98 °C | 22 mm |
| August | 13.82 °C | 24.71 °C | 30 mm |
| September | 10.95 °C | 20.48 °C | 62 mm |
| October | 7.21 °C | 14.29 °C | 123 mm |
| November | 3.24 °C | 8.89 °C | 117 mm |
| December | 0.97 °C | 5.45 °C | 84 mm |
| Annual | 6.8 °C | 14.8 °C | 844 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |