Gardendale, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 51.1 °F (low) to 77.8 °F (high). Annual precipitation averages 13.9 Inches. 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 | 31.4 °F | 58.1 °F | 0.68 in. |
| February | 34.7 °F | 63.1 °F | 0.6 in. |
| March | 41.9 °F | 71.1 °F | 0.83 in. |
| April | 49.7 °F | 79.6 °F | 0.8 in. |
| May | 59.7 °F | 87.2 °F | 1.61 in. |
| June | 68.2 °F | 94.3 °F | 1.54 in. |
| July | 70.7 °F | 94.9 °F | 1.45 in. |
| August | 69.9 °F | 94.0 °F | 1.6 in. |
| September | 62.8 °F | 86.8 °F | 1.96 in. |
| October | 52.1 °F | 78.8 °F | 1.32 in. |
| November | 40.1 °F | 66.8 °F | 0.81 in. |
| December | 32.2 °F | 58.8 °F | 0.68 in. |
| Annual | 51.1 °F | 77.8 °F | 13.88 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |