Silver Firs, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.8 °C (low) to 14.7 °C (high). Annual precipitation averages 1132.6 Millimeters. Silver Firs is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.2 °C | 7.6 °C | 145.03 mm |
| February | 2.2 °C | 8.9 °C | 112.27 mm |
| March | 3.6 °C | 11.1 °C | 120.4 mm |
| April | 5.4 °C | 13.7 °C | 92.71 mm |
| May | 8.2 °C | 17.3 °C | 68.58 mm |
| June | 10.3 °C | 19.6 °C | 56.64 mm |
| July | 12.4 °C | 22.9 °C | 24.89 mm |
| August | 12.8 °C | 23.4 °C | 28.7 mm |
| September | 10.8 °C | 20.4 °C | 54.86 mm |
| October | 7.5 °C | 14.6 °C | 106.17 mm |
| November | 4 °C | 10.1 °C | 170.94 mm |
| December | 2.1 °C | 7.3 °C | 151.38 mm |
| Annual | 6.8 °C | 14.7 °C | 1132.57 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 40-50 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 | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |