La Grulla, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 63.8 °F (low) to 86.5 °F (high). Annual precipitation averages 21.4 Inches. La Grulla is located in USDA Plant Hardiness Zone 10a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 48.4 °F | 71.2 °F | 0.82 in. |
| February | 52.5 °F | 75.9 °F | 0.89 in. |
| March | 58.5 °F | 81.6 °F | 1.1 in. |
| April | 64.5 °F | 87.8 °F | 1.36 in. |
| May | 71.1 °F | 92.8 °F | 2.46 in. |
| June | 75.0 °F | 97.1 °F | 2.45 in. |
| July | 76.0 °F | 98.2 °F | 1.95 in. |
| August | 75.9 °F | 99.3 °F | 1.42 in. |
| September | 72.3 °F | 93.9 °F | 4.58 in. |
| October | 65.0 °F | 88.5 °F | 2.27 in. |
| November | 56.5 °F | 79.6 °F | 1.17 in. |
| December | 49.5 °F | 72.4 °F | 0.97 in. |
| Annual | 63.8 °F | 86.5 °F | 21.44 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |