Montevallo, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.2 °F (low) to 75.4 °F (high). Annual precipitation averages 57.7 Inches. Montevallo is located in USDA Plant Hardiness Zone 8a. 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 | 33.0 °F | 55.9 °F | 5.38 in. |
| February | 35.9 °F | 60.5 °F | 5.84 in. |
| March | 42.3 °F | 68.5 °F | 5.56 in. |
| April | 49.2 °F | 76.1 °F | 5.23 in. |
| May | 58.5 °F | 83.2 °F | 4.27 in. |
| June | 66.2 °F | 89.1 °F | 4.88 in. |
| July | 69.7 °F | 92.0 °F | 5.05 in. |
| August | 69.0 °F | 91.4 °F | 4.2 in. |
| September | 63.3 °F | 87.1 °F | 3.85 in. |
| October | 51.2 °F | 77.2 °F | 3.23 in. |
| November | 40.5 °F | 66.1 °F | 4.61 in. |
| December | 35.4 °F | 58.0 °F | 5.58 in. |
| Annual | 51.2 °F | 75.4 °F | 57.68 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |