Chilliwack, British Columbia climate data is summarized below. Average annual temperatures range from 6.8 °C (low) to 15.3 °C (high). Annual precipitation averages 1888 Millimeters. 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 | 0.43 °C | 5.79 °C | 213 mm |
| February | 1.96 °C | 8.22 °C | 149 mm |
| March | 2.88 °C | 10.44 °C | 210 mm |
| April | 5.17 °C | 14.63 °C | 109 mm |
| May | 9.12 °C | 19.6 °C | 93 mm |
| June | 11.53 °C | 21.71 °C | 67 mm |
| July | 13.88 °C | 25.7 °C | 53 mm |
| August | 13.89 °C | 25.75 °C | 65 mm |
| September | 11.25 °C | 21.77 °C | 139 mm |
| October | 7.43 °C | 15.26 °C | 260 mm |
| November | 3.42 °C | 9.1 °C | 309 mm |
| December | 0.6 °C | 5.04 °C | 221 mm |
| Annual | 6.8 °C | 15.3 °C | 1888 mm |
| 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 : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |