Canterwood, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.2 °C (low) to 15.5 °C (high). Annual precipitation averages 1291.6 Millimeters. Canterwood is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.7 °C | 8.1 °C | 196.34 mm |
| February | 1.6 °C | 9.4 °C | 119.89 mm |
| March | 2.8 °C | 11.7 °C | 144.53 mm |
| April | 4.6 °C | 14.4 °C | 98.04 mm |
| May | 7.6 °C | 18.2 °C | 54.61 mm |
| June | 10.1 °C | 20.8 °C | 40.89 mm |
| July | 12 °C | 24.2 °C | 17.78 mm |
| August | 12.1 °C | 24.4 °C | 27.69 mm |
| September | 9.9 °C | 21.2 °C | 48.01 mm |
| October | 6.6 °C | 15.2 °C | 131.57 mm |
| November | 3.4 °C | 10.6 °C | 207.01 mm |
| December | 1.6 °C | 7.6 °C | 205.23 mm |
| Annual | 6.2 °C | 15.5 °C | 1291.59 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |