Canterwood, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43.1 °F (low) to 59.8 °F (high). Annual precipitation averages 50.9 Inches. 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 | 35.1 °F | 46.5 °F | 7.73 in. |
| February | 34.8 °F | 48.9 °F | 4.72 in. |
| March | 37.1 °F | 53.1 °F | 5.69 in. |
| April | 40.2 °F | 57.9 °F | 3.86 in. |
| May | 45.6 °F | 64.8 °F | 2.15 in. |
| June | 50.1 °F | 69.4 °F | 1.61 in. |
| July | 53.6 °F | 75.5 °F | 0.7 in. |
| August | 53.7 °F | 75.9 °F | 1.09 in. |
| September | 49.9 °F | 70.2 °F | 1.89 in. |
| October | 43.8 °F | 59.3 °F | 5.18 in. |
| November | 38.2 °F | 51.0 °F | 8.15 in. |
| December | 34.8 °F | 45.6 °F | 8.08 in. |
| Annual | 43.1 °F | 59.8 °F | 50.85 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |