Gainesville, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.4 °C (low) to 23.9 °C (high). Annual precipitation averages 1406.7 Millimeters. Gainesville 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °C | 13 °C | 134.87 mm |
| February | 2.9 °C | 15.5 °C | 137.67 mm |
| March | 6.5 °C | 20.1 °C | 143.51 mm |
| April | 10.7 °C | 24.1 °C | 136.4 mm |
| May | 15.8 °C | 28.1 °C | 101.35 mm |
| June | 20.1 °C | 31.6 °C | 112.52 mm |
| July | 21.7 °C | 32.9 °C | 123.95 mm |
| August | 21.2 °C | 32.7 °C | 108.2 mm |
| September | 17.9 °C | 30.4 °C | 84.84 mm |
| October | 11.1 °C | 25.1 °C | 88.65 mm |
| November | 5.1 °C | 18.6 °C | 106.43 mm |
| December | 2.5 °C | 14.3 °C | 128.27 mm |
| Annual | 11.4 °C | 23.9 °C | 1406.66 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 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 |