Lexington, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.7 °C (low) to 26.2 °C (high). Annual precipitation averages 961.7 Millimeters. 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 | 3.6 °C | 16 °C | 80.01 mm |
| February | 5.8 °C | 18 °C | 58.93 mm |
| March | 9.3 °C | 22 °C | 76.96 mm |
| April | 13.1 °C | 25.8 °C | 69.09 mm |
| May | 18 °C | 29.6 °C | 119.89 mm |
| June | 21.7 °C | 33.2 °C | 82.55 mm |
| July | 22.9 °C | 35.1 °C | 44.96 mm |
| August | 22.7 °C | 35.7 °C | 73.66 mm |
| September | 19.7 °C | 32.5 °C | 74.93 mm |
| October | 14 °C | 27.6 °C | 114.3 mm |
| November | 8.4 °C | 21.4 °C | 82.8 mm |
| December | 4.6 °C | 16.9 °C | 83.57 mm |
| Annual | 13.7 °C | 26.2 °C | 961.65 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |