Basin City, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 40.3 °F (low) to 64 °F (high). Annual precipitation averages 8.7 Inches. Basin City is located in USDA Plant Hardiness Zone 7a. 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 | 27.1 °F | 39.3 °F | 1.19 in. |
| February | 28.6 °F | 46.4 °F | 0.82 in. |
| March | 33.2 °F | 56.2 °F | 0.79 in. |
| April | 38.0 °F | 64.3 °F | 0.75 in. |
| May | 45.2 °F | 73.5 °F | 0.75 in. |
| June | 51.2 °F | 79.9 °F | 0.69 in. |
| July | 56.8 °F | 89.1 °F | 0.21 in. |
| August | 56.3 °F | 88.0 °F | 0.21 in. |
| September | 48.8 °F | 78.9 °F | 0.29 in. |
| October | 39.5 °F | 64.2 °F | 0.78 in. |
| November | 31.7 °F | 48.8 °F | 1.02 in. |
| December | 26.7 °F | 38.8 °F | 1.21 in. |
| Annual | 40.3 °F | 64 °F | 8.71 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 |