Atlanta, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.7 °C (low) to 25.2 °C (high). Annual precipitation averages 1494 Millimeters. Atlanta is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.9 °C | 14.7 °C | 146.05 mm |
| February | 4.5 °C | 16.9 °C | 127.76 mm |
| March | 8.3 °C | 21.3 °C | 136.91 mm |
| April | 12.2 °C | 25.3 °C | 146.05 mm |
| May | 17.1 °C | 29.2 °C | 121.16 mm |
| June | 20.9 °C | 32.6 °C | 122.17 mm |
| July | 22.4 °C | 33.9 °C | 112.27 mm |
| August | 21.9 °C | 34.2 °C | 97.28 mm |
| September | 18.8 °C | 31.6 °C | 92.96 mm |
| October | 12.7 °C | 26.4 °C | 113.28 mm |
| November | 7.1 °C | 20.2 °C | 128.78 mm |
| December | 3.9 °C | 15.7 °C | 149.35 mm |
| Annual | 12.7 °C | 25.2 °C | 1494.02 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |