Suquamish, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 44.7 °F (low) to 60.7 °F (high). Annual precipitation averages 36.3 Inches. Suquamish is located in USDA Plant Hardiness Zone 9a. 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 | 37.0 °F | 47.2 °F | 5.13 in. |
| February | 36.9 °F | 49.6 °F | 3.16 in. |
| March | 39.0 °F | 53.5 °F | 3.86 in. |
| April | 42.0 °F | 59.2 °F | 2.71 in. |
| May | 47.0 °F | 65.9 °F | 1.9 in. |
| June | 51.2 °F | 70.3 °F | 1.77 in. |
| July | 54.4 °F | 76.2 °F | 0.84 in. |
| August | 54.7 °F | 76.7 °F | 0.96 in. |
| September | 51.5 °F | 71.1 °F | 1.56 in. |
| October | 45.9 °F | 60.7 °F | 3.36 in. |
| November | 40.3 °F | 51.6 °F | 5.44 in. |
| December | 36.7 °F | 46.4 °F | 5.59 in. |
| Annual | 44.7 °F | 60.7 °F | 36.28 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°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 |