Lexington, Oregon has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 40.1 °F (low) to 63.9 °F (high). Annual precipitation averages 11.6 Inches. Lexington 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 | 27.9 °F | 42.4 °F | 1.31 in. |
| February | 29.1 °F | 47.2 °F | 1.05 in. |
| March | 33.4 °F | 55.3 °F | 1.18 in. |
| April | 38.0 °F | 62.2 °F | 1.18 in. |
| May | 44.5 °F | 71.0 °F | 1.38 in. |
| June | 50.0 °F | 78.0 °F | 1.03 in. |
| July | 55.7 °F | 88.1 °F | 0.23 in. |
| August | 55.1 °F | 87.4 °F | 0.26 in. |
| September | 48.4 °F | 78.3 °F | 0.38 in. |
| October | 39.5 °F | 64.6 °F | 0.97 in. |
| November | 32.3 °F | 50.6 °F | 1.34 in. |
| December | 27.4 °F | 41.4 °F | 1.32 in. |
| Annual | 40.1 °F | 63.9 °F | 11.63 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |