Chilliwack, British Columbia climate data is summarized below. Average annual temperatures range from 44.3 °F (low) to 59.5 °F (high). Annual precipitation averages 74.4 Inches. Chilliwack is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.5 °F | -14.6 °F | 5410.2 in. |
| February | -16.7 °F | -13.2 °F | 3784.6 in. |
| March | -16.2 °F | -12 °F | 5334 in. |
| April | -14.9 °F | -9.7 °F | 2768.6 in. |
| May | -12.7 °F | -6.9 °F | 2362.2 in. |
| June | -11.4 °F | -5.7 °F | 1701.8 in. |
| July | -10.1 °F | -3.5 °F | 1346.2 in. |
| August | -10.1 °F | -3.5 °F | 1651 in. |
| September | -11.5 °F | -5.7 °F | 3530.6 in. |
| October | -13.7 °F | -9.3 °F | 6604 in. |
| November | -15.9 °F | -12.7 °F | 7848.6 in. |
| December | -17.4 °F | -15 °F | 5613.4 in. |
| Annual | 44.3 °F | 59.5 °F | 74.35 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |