Suquamish, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.1 °C (low) to 15.9 °C (high). Annual precipitation averages 921.5 Millimeters. 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 | 2.8 °C | 8.4 °C | 130.3 mm |
| February | 2.7 °C | 9.8 °C | 80.26 mm |
| March | 3.9 °C | 11.9 °C | 98.04 mm |
| April | 5.6 °C | 15.1 °C | 68.83 mm |
| May | 8.3 °C | 18.8 °C | 48.26 mm |
| June | 10.7 °C | 21.3 °C | 44.96 mm |
| July | 12.4 °C | 24.6 °C | 21.34 mm |
| August | 12.6 °C | 24.8 °C | 24.38 mm |
| September | 10.8 °C | 21.7 °C | 39.62 mm |
| October | 7.7 °C | 15.9 °C | 85.34 mm |
| November | 4.6 °C | 10.9 °C | 138.18 mm |
| December | 2.6 °C | 8 °C | 141.99 mm |
| Annual | 7.1 °C | 15.9 °C | 921.5 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |