Edgewood, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43.3 °F (low) to 60.5 °F (high). Annual precipitation averages 47 Inches. 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 | 35.1 °F | 46.7 °F | 6.55 in. |
| February | 35.0 °F | 49.3 °F | 4.37 in. |
| March | 37.3 °F | 53.4 °F | 5.12 in. |
| April | 40.5 °F | 58.7 °F | 3.89 in. |
| May | 46.0 °F | 65.7 °F | 2.43 in. |
| June | 50.3 °F | 70.2 °F | 2.2 in. |
| July | 54.0 °F | 76.5 °F | 0.9 in. |
| August | 54.2 °F | 77.1 °F | 1.35 in. |
| September | 50.1 °F | 71.4 °F | 1.88 in. |
| October | 43.8 °F | 60.4 °F | 4.81 in. |
| November | 38.3 °F | 51.3 °F | 6.86 in. |
| December | 34.6 °F | 45.8 °F | 6.59 in. |
| Annual | 43.3 °F | 60.5 °F | 46.95 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 | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |