Heath, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.8 °C (low) to 25.4 °C (high). Annual precipitation averages 1556.8 Millimeters. Heath 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 | 3 °C | 15.7 °C | 142.24 mm |
| February | 4.9 °C | 18.2 °C | 121.92 mm |
| March | 8.2 °C | 21.9 °C | 142.49 mm |
| April | 11.8 °C | 25.6 °C | 121.67 mm |
| May | 16.5 °C | 29.4 °C | 112.52 mm |
| June | 20.7 °C | 32.4 °C | 147.07 mm |
| July | 22.1 °C | 33.5 °C | 167.39 mm |
| August | 21.8 °C | 32.9 °C | 139.19 mm |
| September | 19.2 °C | 31 °C | 120.14 mm |
| October | 13.1 °C | 26.3 °C | 91.95 mm |
| November | 7.2 °C | 20.9 °C | 110.49 mm |
| December | 4.7 °C | 17 °C | 139.7 mm |
| Annual | 12.8 °C | 25.4 °C | 1556.77 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 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 |