Lexington, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.6 °F (low) to 79.1 °F (high). Annual precipitation averages 37.9 Inches. Lexington is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.5 °F | 60.8 °F | 3.15 in. |
| February | 42.4 °F | 64.4 °F | 2.32 in. |
| March | 48.8 °F | 71.6 °F | 3.03 in. |
| April | 55.6 °F | 78.5 °F | 2.72 in. |
| May | 64.4 °F | 85.2 °F | 4.72 in. |
| June | 71.1 °F | 91.8 °F | 3.25 in. |
| July | 73.2 °F | 95.1 °F | 1.77 in. |
| August | 72.9 °F | 96.2 °F | 2.9 in. |
| September | 67.5 °F | 90.5 °F | 2.95 in. |
| October | 57.2 °F | 81.6 °F | 4.5 in. |
| November | 47.2 °F | 70.5 °F | 3.26 in. |
| December | 40.2 °F | 62.5 °F | 3.29 in. |
| Annual | 56.6 °F | 79.1 °F | 37.86 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |