Horseshoe Bay, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.3 °F (low) to 79.3 °F (high). Annual precipitation averages 31.1 Inches. Horseshoe Bay is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.6 °F | 61.2 °F | 1.86 in. |
| February | 38.7 °F | 64.8 °F | 1.94 in. |
| March | 46.2 °F | 71.9 °F | 2.61 in. |
| April | 53.5 °F | 79.4 °F | 2.32 in. |
| May | 62.8 °F | 85.6 °F | 3.96 in. |
| June | 69.7 °F | 92.4 °F | 2.85 in. |
| July | 72.1 °F | 95.5 °F | 2.15 in. |
| August | 71.9 °F | 96.7 °F | 1.98 in. |
| September | 65.9 °F | 90.4 °F | 3.24 in. |
| October | 54.8 °F | 81.6 °F | 3.15 in. |
| November | 44.9 °F | 70.5 °F | 2.83 in. |
| December | 36.1 °F | 62.1 °F | 2.18 in. |
| Annual | 54.3 °F | 79.3 °F | 31.07 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |