Lawn, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.5 °F (low) to 76.6 °F (high). Annual precipitation averages 25.5 Inches. Lawn is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.5 °F | 57.2 °F | 1.14 in. |
| February | 35.3 °F | 61.4 °F | 1.41 in. |
| March | 43.0 °F | 68.9 °F | 1.89 in. |
| April | 49.9 °F | 77.1 °F | 1.69 in. |
| May | 59.9 °F | 84.6 °F | 3.36 in. |
| June | 67.8 °F | 91.0 °F | 3.38 in. |
| July | 70.6 °F | 94.4 °F | 1.96 in. |
| August | 70.2 °F | 94.4 °F | 2.49 in. |
| September | 63.2 °F | 87.2 °F | 2.85 in. |
| October | 52.5 °F | 78.1 °F | 2.55 in. |
| November | 41.2 °F | 66.4 °F | 1.63 in. |
| December | 33.2 °F | 58.3 °F | 1.17 in. |
| Annual | 51.5 °F | 76.6 °F | 25.52 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |