Calera, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.4 °F (low) to 75 °F (high). Annual precipitation averages 57.3 Inches. Calera 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 | 33.5 °F | 55.7 °F | 5.33 in. |
| February | 36.4 °F | 60.2 °F | 5.79 in. |
| March | 42.7 °F | 68.1 °F | 5.64 in. |
| April | 49.5 °F | 75.7 °F | 5.27 in. |
| May | 58.6 °F | 82.8 °F | 4.2 in. |
| June | 66.3 °F | 88.6 °F | 4.7 in. |
| July | 69.7 °F | 91.5 °F | 4.89 in. |
| August | 69.0 °F | 90.9 °F | 4.26 in. |
| September | 63.4 °F | 86.6 °F | 3.89 in. |
| October | 51.4 °F | 76.9 °F | 3.37 in. |
| November | 40.9 °F | 65.9 °F | 4.57 in. |
| December | 35.8 °F | 57.6 °F | 5.42 in. |
| Annual | 51.4 °F | 75 °F | 57.33 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |