New Westminster, British Columbia climate data is summarized below. Average annual temperatures range from 44.3 °F (low) to 58.6 °F (high). Annual precipitation averages 33.2 Inches. 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 | -17.2 °F | -14.5 °F | 2768.6 in. |
| February | -16.4 °F | -13 °F | 1803.4 in. |
| March | -15.9 °F | -12.1 °F | 2667 in. |
| April | -15 °F | -9.9 °F | 1320.8 in. |
| May | -12.9 °F | -7.3 °F | 965.2 in. |
| June | -11.5 °F | -6.2 °F | 787.4 in. |
| July | -10.1 °F | -3.9 °F | 558.8 in. |
| August | -10.1 °F | -4.1 °F | 762 in. |
| September | -11.7 °F | -6.4 °F | 1574.8 in. |
| October | -13.8 °F | -9.8 °F | 3124.2 in. |
| November | -16 °F | -12.8 °F | 2971.8 in. |
| December | -17.2 °F | -14.8 °F | 2133.6 in. |
| Annual | 44.3 °F | 58.6 °F | 33.24 in. |
| 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 : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |