Santa Cruz, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 63.2 °F (low) to 86.9 °F (high). Annual precipitation averages 20.3 Inches. Santa Cruz is located in USDA Plant Hardiness Zone 9b. 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 | 47.4 °F | 71.1 °F | 0.71 in. |
| February | 51.5 °F | 76.0 °F | 0.78 in. |
| March | 57.7 °F | 82.2 °F | 0.96 in. |
| April | 64.1 °F | 88.5 °F | 1.38 in. |
| May | 70.8 °F | 93.6 °F | 2.69 in. |
| June | 74.6 °F | 98.1 °F | 2.37 in. |
| July | 75.6 °F | 99.1 °F | 1.58 in. |
| August | 75.5 °F | 99.7 °F | 1.26 in. |
| September | 72.1 °F | 94.2 °F | 4.57 in. |
| October | 64.8 °F | 88.4 °F | 2.07 in. |
| November | 56.0 °F | 79.4 °F | 1.02 in. |
| December | 48.7 °F | 71.9 °F | 0.87 in. |
| Annual | 63.2 °F | 86.9 °F | 20.26 in. |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |