Haralson, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.4 °C (low) to 22.7 °C (high). Annual precipitation averages 1311.2 Millimeters. Haralson is located in USDA Plant Hardiness Zone 8a. 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 | 0.2 °C | 12.4 °C | 120.14 mm |
| February | 1.8 °C | 14.4 °C | 123.19 mm |
| March | 5.3 °C | 18.7 °C | 130.3 mm |
| April | 9.4 °C | 22.9 °C | 107.7 mm |
| May | 14.6 °C | 27 °C | 86.11 mm |
| June | 18.9 °C | 30.2 °C | 107.95 mm |
| July | 20.7 °C | 31.7 °C | 124.46 mm |
| August | 20.3 °C | 31.3 °C | 108.97 mm |
| September | 17 °C | 28.6 °C | 92.71 mm |
| October | 10.6 °C | 23.5 °C | 83.31 mm |
| November | 4.4 °C | 18.1 °C | 99.82 mm |
| December | 1.7 °C | 13.7 °C | 126.49 mm |
| Annual | 10.4 °C | 22.7 °C | 1311.15 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |