Yakima, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 38.3 °F (low) to 63.6 °F (high). Annual precipitation averages 8.4 Inches. Yakima is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.5 °F | 38.8 °F | 1.23 in. |
| February | 26.9 °F | 46.6 °F | 0.83 in. |
| March | 31.4 °F | 55.5 °F | 0.72 in. |
| April | 36.5 °F | 63.4 °F | 0.61 in. |
| May | 44.4 °F | 72.8 °F | 0.84 in. |
| June | 50.2 °F | 79.3 °F | 0.51 in. |
| July | 55.7 °F | 88.5 °F | 0.25 in. |
| August | 54.4 °F | 87.7 °F | 0.19 in. |
| September | 46.4 °F | 78.9 °F | 0.29 in. |
| October | 36.9 °F | 64.5 °F | 0.67 in. |
| November | 28.8 °F | 49.0 °F | 0.86 in. |
| December | 23.7 °F | 37.9 °F | 1.37 in. |
| Annual | 38.3 °F | 63.6 °F | 8.37 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |