Gardendale, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 10.6 °C (low) to 25.4 °C (high). Annual precipitation averages 352.5 Millimeters. Gardendale is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.3 °C | 14.5 °C | 17.27 mm |
| February | 1.5 °C | 17.3 °C | 15.24 mm |
| March | 5.5 °C | 21.7 °C | 21.08 mm |
| April | 9.8 °C | 26.4 °C | 20.32 mm |
| May | 15.4 °C | 30.7 °C | 40.89 mm |
| June | 20.1 °C | 34.6 °C | 39.12 mm |
| July | 21.5 °C | 34.9 °C | 36.83 mm |
| August | 21.1 °C | 34.4 °C | 40.64 mm |
| September | 17.1 °C | 30.4 °C | 49.78 mm |
| October | 11.2 °C | 26 °C | 33.53 mm |
| November | 4.5 °C | 19.3 °C | 20.57 mm |
| December | 0.1 °C | 14.9 °C | 17.27 mm |
| Annual | 10.6 °C | 25.4 °C | 352.54 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |