Enumclaw, Washington has a Temperate Oceanic Climate climate (Köppen classification: Cfb). Average annual temperatures range from 41.8 °F (low) to 59.5 °F (high). Annual precipitation averages 50.8 Inches. Enumclaw is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.9 °F | 45.4 °F | 6.47 in. |
| February | 33.7 °F | 48.1 °F | 4.65 in. |
| March | 35.7 °F | 52.3 °F | 5.46 in. |
| April | 38.9 °F | 57.3 °F | 4.6 in. |
| May | 44.5 °F | 64.4 °F | 3.49 in. |
| June | 48.8 °F | 68.8 °F | 3.01 in. |
| July | 52.5 °F | 75.6 °F | 1.2 in. |
| August | 52.7 °F | 76.8 °F | 1.37 in. |
| September | 48.5 °F | 70.8 °F | 2.16 in. |
| October | 42.2 °F | 59.7 °F | 4.92 in. |
| November | 37.0 °F | 50.1 °F | 7.24 in. |
| December | 33.1 °F | 44.2 °F | 6.18 in. |
| Annual | 41.8 °F | 59.5 °F | 50.75 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 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 | Cfb - Temperate Oceanic Climate |