Buena, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 38.7 °F (low) to 64 °F (high). Annual precipitation averages 7.9 Inches. Buena is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.4 °F | 39.4 °F | 1.08 in. |
| February | 27.1 °F | 47.2 °F | 0.7 in. |
| March | 32.0 °F | 56.4 °F | 0.57 in. |
| April | 37.1 °F | 64.2 °F | 0.54 in. |
| May | 44.8 °F | 73.4 °F | 0.8 in. |
| June | 50.5 °F | 79.7 °F | 0.61 in. |
| July | 55.9 °F | 88.7 °F | 0.25 in. |
| August | 54.3 °F | 87.6 °F | 0.2 in. |
| September | 46.5 °F | 79.0 °F | 0.25 in. |
| October | 37.3 °F | 64.8 °F | 0.71 in. |
| November | 29.3 °F | 49.4 °F | 0.9 in. |
| December | 24.7 °F | 38.3 °F | 1.28 in. |
| Annual | 38.7 °F | 64 °F | 7.89 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |