Maplewood, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43.5 °F (low) to 60.2 °F (high). Annual precipitation averages 50.3 Inches. Maplewood is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.4 °F | 46.7 °F | 7.59 in. |
| February | 35.2 °F | 49.2 °F | 4.77 in. |
| March | 37.5 °F | 53.3 °F | 5.72 in. |
| April | 40.6 °F | 58.4 °F | 3.88 in. |
| May | 46.0 °F | 65.4 °F | 2.12 in. |
| June | 50.5 °F | 69.8 °F | 1.56 in. |
| July | 54.0 °F | 76.0 °F | 0.7 in. |
| August | 54.2 °F | 76.4 °F | 1.06 in. |
| September | 50.2 °F | 70.7 °F | 1.84 in. |
| October | 44.2 °F | 59.8 °F | 4.99 in. |
| November | 38.6 °F | 51.1 °F | 8.05 in. |
| December | 35.1 °F | 45.8 °F | 8.03 in. |
| Annual | 43.5 °F | 60.2 °F | 50.31 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 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 | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |