Alabaster, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11 °C (low) to 23.9 °C (high). Annual precipitation averages 1449.1 Millimeters. Alabaster 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 | 0.9 °C | 13.1 °C | 134.87 mm |
| February | 2.6 °C | 15.6 °C | 145.03 mm |
| March | 6.2 °C | 19.9 °C | 139.45 mm |
| April | 10.1 °C | 24.1 °C | 132.84 mm |
| May | 15.1 °C | 28.1 °C | 107.95 mm |
| June | 19.3 °C | 31.4 °C | 120.65 mm |
| July | 21.1 °C | 33 °C | 116.84 mm |
| August | 20.8 °C | 32.8 °C | 114.3 mm |
| September | 17.7 °C | 30.4 °C | 103.89 mm |
| October | 11.1 °C | 24.8 °C | 83.31 mm |
| November | 5.2 °C | 18.8 °C | 115.82 mm |
| December | 2.3 °C | 14.2 °C | 134.11 mm |
| Annual | 11 °C | 23.9 °C | 1449.06 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |