Bessemer, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.9 °C (low) to 23.7 °C (high). Annual precipitation averages 1459.2 Millimeters. Bessemer is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °C | 12.8 °C | 137.16 mm |
| February | 2.3 °C | 15.3 °C | 138.43 mm |
| March | 5.9 °C | 19.7 °C | 140.72 mm |
| April | 9.9 °C | 24.1 °C | 130.56 mm |
| May | 15 °C | 27.9 °C | 111 mm |
| June | 19.2 °C | 31.3 °C | 122.17 mm |
| July | 21 °C | 32.9 °C | 123.44 mm |
| August | 20.6 °C | 32.7 °C | 108.46 mm |
| September | 17.5 °C | 30.3 °C | 112.01 mm |
| October | 10.9 °C | 24.7 °C | 84.33 mm |
| November | 5.1 °C | 18.6 °C | 118.11 mm |
| December | 2.2 °C | 14 °C | 132.84 mm |
| Annual | 10.9 °C | 23.7 °C | 1459.23 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |