Edgewood, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.3 °C (low) to 15.9 °C (high). Annual precipitation averages 1192.5 Millimeters. Edgewood 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 | 8.2 °C | 166.37 mm |
| February | 1.7 °C | 9.6 °C | 111 mm |
| March | 2.9 °C | 11.9 °C | 130.05 mm |
| April | 4.7 °C | 14.8 °C | 98.81 mm |
| May | 7.8 °C | 18.7 °C | 61.72 mm |
| June | 10.2 °C | 21.2 °C | 55.88 mm |
| July | 12.2 °C | 24.7 °C | 22.86 mm |
| August | 12.3 °C | 25.1 °C | 34.29 mm |
| September | 10.1 °C | 21.9 °C | 47.75 mm |
| October | 6.6 °C | 15.8 °C | 122.17 mm |
| November | 3.5 °C | 10.7 °C | 174.24 mm |
| December | 1.4 °C | 7.7 °C | 167.39 mm |
| Annual | 6.3 °C | 15.9 °C | 1192.53 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 | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |