Lebam, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.3 °F (low) to 60.2 °F (high). Annual precipitation averages 93.1 Inches. Lebam is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.8 °F | 47.7 °F | 14.53 in. |
| February | 34.0 °F | 50.7 °F | 8.88 in. |
| March | 35.8 °F | 54.4 °F | 10.71 in. |
| April | 38.3 °F | 58.2 °F | 7.46 in. |
| May | 43.4 °F | 64.1 °F | 4.01 in. |
| June | 47.3 °F | 67.3 °F | 3.15 in. |
| July | 50.8 °F | 73.4 °F | 1.05 in. |
| August | 50.9 °F | 74.2 °F | 1.67 in. |
| September | 47.3 °F | 71.7 °F | 3.51 in. |
| October | 41.5 °F | 61.9 °F | 9.06 in. |
| November | 36.9 °F | 52.4 °F | 14.28 in. |
| December | 34.3 °F | 46.9 °F | 14.79 in. |
| Annual | 41.3 °F | 60.2 °F | 93.1 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Csb - Warm-Summer Mediterranean Climate |