La Grange, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.3 °C (low) to 26.6 °C (high). Annual precipitation averages 1019.6 Millimeters. La Grange is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.6 °C | 16.7 °C | 78.99 mm |
| February | 6.6 °C | 18.7 °C | 68.58 mm |
| March | 10.2 °C | 22.4 °C | 78.23 mm |
| April | 13.9 °C | 26.4 °C | 83.57 mm |
| May | 18.5 °C | 30.1 °C | 114.55 mm |
| June | 22.1 °C | 33.4 °C | 99.31 mm |
| July | 22.9 °C | 35.1 °C | 51.31 mm |
| August | 22.9 °C | 35.9 °C | 65.02 mm |
| September | 20.2 °C | 32.7 °C | 89.92 mm |
| October | 14.7 °C | 27.9 °C | 119.89 mm |
| November | 9.1 °C | 21.9 °C | 89.92 mm |
| December | 5.3 °C | 17.7 °C | 80.26 mm |
| Annual | 14.3 °C | 26.6 °C | 1019.55 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |