Waitsburg, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.8 °F (low) to 63.3 °F (high). Annual precipitation averages 18.2 Inches. Waitsburg is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.6 °F | 41.3 °F | 2.05 in. |
| February | 30.4 °F | 46.1 °F | 1.67 in. |
| March | 35.2 °F | 54.7 °F | 2.03 in. |
| April | 39.8 °F | 61.7 °F | 1.8 in. |
| May | 46.5 °F | 70.5 °F | 1.74 in. |
| June | 52.1 °F | 77.6 °F | 1.24 in. |
| July | 57.9 °F | 88.4 °F | 0.39 in. |
| August | 57.5 °F | 87.9 °F | 0.44 in. |
| September | 50.2 °F | 78.2 °F | 0.66 in. |
| October | 40.9 °F | 63.6 °F | 1.53 in. |
| November | 33.5 °F | 49.1 °F | 2.26 in. |
| December | 28.4 °F | 40.6 °F | 2.39 in. |
| Annual | 41.8 °F | 63.3 °F | 18.2 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |