Hornsby Bend, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.5 °C (low) to 26.4 °C (high). Annual precipitation averages 931.2 Millimeters. Hornsby Bend is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.2 °C | 16.5 °C | 68.33 mm |
| February | 5.3 °C | 18.3 °C | 53.34 mm |
| March | 9.2 °C | 22.1 °C | 74.93 mm |
| April | 12.9 °C | 26.1 °C | 70.1 mm |
| May | 18.2 °C | 29.8 °C | 118.87 mm |
| June | 21.9 °C | 33.5 °C | 88.14 mm |
| July | 23 °C | 35.1 °C | 61.21 mm |
| August | 22.9 °C | 35.9 °C | 65.79 mm |
| September | 19.7 °C | 32.6 °C | 83.06 mm |
| October | 13.9 °C | 27.8 °C | 100.33 mm |
| November | 8.2 °C | 21.8 °C | 72.39 mm |
| December | 3.9 °C | 17.3 °C | 74.68 mm |
| Annual | 13.5 °C | 26.4 °C | 931.17 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |