Bandera, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.9 °C (low) to 26.6 °C (high). Annual precipitation averages 867.4 Millimeters. Bandera is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.7 °C | 17 °C | 50.55 mm |
| February | 4.8 °C | 19.4 °C | 46.23 mm |
| March | 8.8 °C | 23 °C | 67.82 mm |
| April | 12.5 °C | 26.8 °C | 61.98 mm |
| May | 17.5 °C | 30.1 °C | 118.36 mm |
| June | 20.9 °C | 33.3 °C | 91.95 mm |
| July | 21.9 °C | 34.8 °C | 67.56 mm |
| August | 21.7 °C | 35.5 °C | 67.82 mm |
| September | 18.8 °C | 32.3 °C | 93.73 mm |
| October | 13.5 °C | 27.7 °C | 87.38 mm |
| November | 7.8 °C | 21.7 °C | 62.48 mm |
| December | 3.5 °C | 17.7 °C | 51.56 mm |
| Annual | 12.9 °C | 26.6 °C | 867.42 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |