Brighton, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11 °C (low) to 23.6 °C (high). Annual precipitation averages 1466.1 Millimeters. Brighton 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 | 0.9 °C | 12.7 °C | 134.87 mm |
| February | 2.3 °C | 15.2 °C | 138.94 mm |
| March | 6.1 °C | 19.7 °C | 141.22 mm |
| April | 10.1 °C | 24 °C | 130.81 mm |
| May | 15.1 °C | 27.8 °C | 111.51 mm |
| June | 19.3 °C | 31.2 °C | 122.94 mm |
| July | 21.1 °C | 32.9 °C | 125.73 mm |
| August | 20.7 °C | 32.6 °C | 108.46 mm |
| September | 17.6 °C | 30.2 °C | 113.79 mm |
| October | 11.1 °C | 24.5 °C | 85.09 mm |
| November | 5.3 °C | 18.4 °C | 119.38 mm |
| December | 2.2 °C | 13.9 °C | 133.35 mm |
| Annual | 11 °C | 23.6 °C | 1466.09 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 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |