Odessa, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 37.4 °F (low) to 61.4 °F (high). Annual precipitation averages 10.8 Inches. Odessa is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.9 °F | 36.1 °F | 1.47 in. |
| February | 26.3 °F | 42.7 °F | 0.97 in. |
| March | 30.8 °F | 52.5 °F | 1.12 in. |
| April | 35.2 °F | 61.3 °F | 0.84 in. |
| May | 42.5 °F | 70.7 °F | 0.96 in. |
| June | 48.2 °F | 77.6 °F | 0.79 in. |
| July | 53.9 °F | 87.5 °F | 0.33 in. |
| August | 53.3 °F | 87.0 °F | 0.26 in. |
| September | 45.6 °F | 77.6 °F | 0.34 in. |
| October | 36.4 °F | 62.5 °F | 0.82 in. |
| November | 28.8 °F | 45.9 °F | 1.38 in. |
| December | 23.3 °F | 35.6 °F | 1.5 in. |
| Annual | 37.4 °F | 61.4 °F | 10.78 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |