La Grulla, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 17.6 °C (low) to 30.3 °C (high). Annual precipitation averages 544.6 Millimeters. 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 | 9.1 °C | 21.8 °C | 20.83 mm |
| February | 11.4 °C | 24.4 °C | 22.61 mm |
| March | 14.7 °C | 27.6 °C | 27.94 mm |
| April | 18.1 °C | 31 °C | 34.54 mm |
| May | 21.7 °C | 33.8 °C | 62.48 mm |
| June | 23.9 °C | 36.2 °C | 62.23 mm |
| July | 24.4 °C | 36.8 °C | 49.53 mm |
| August | 24.4 °C | 37.4 °C | 36.07 mm |
| September | 22.4 °C | 34.4 °C | 116.33 mm |
| October | 18.3 °C | 31.4 °C | 57.66 mm |
| November | 13.6 °C | 26.4 °C | 29.72 mm |
| December | 9.7 °C | 22.4 °C | 24.64 mm |
| Annual | 17.6 °C | 30.3 °C | 544.58 mm |
| 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 : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |