Balmorhea, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 49.3 °F (low) to 79.7 °F (high). Annual precipitation averages 12.6 Inches. Balmorhea 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 30.5 °F | 60.6 °F | 0.59 in. |
| February | 34.0 °F | 65.9 °F | 0.49 in. |
| March | 40.1 °F | 73.6 °F | 0.37 in. |
| April | 47.8 °F | 82.0 °F | 0.49 in. |
| May | 57.4 °F | 89.3 °F | 1.06 in. |
| June | 65.9 °F | 96.0 °F | 1.22 in. |
| July | 68.3 °F | 95.4 °F | 1.85 in. |
| August | 67.3 °F | 94.5 °F | 2.27 in. |
| September | 60.8 °F | 87.7 °F | 2.17 in. |
| October | 49.9 °F | 80.6 °F | 1.0 in. |
| November | 38.1 °F | 69.6 °F | 0.54 in. |
| December | 31.1 °F | 61.3 °F | 0.56 in. |
| Annual | 49.3 °F | 79.7 °F | 12.61 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 | BSk - Cold Semi-Arid Climate |