Forest Park, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.9 °F (low) to 72.2 °F (high). Annual precipitation averages 52.7 Inches. Forest Park 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 | 33.0 °F | 53.1 °F | 4.85 in. |
| February | 36.0 °F | 56.9 °F | 4.84 in. |
| March | 42.6 °F | 64.8 °F | 5.06 in. |
| April | 50.5 °F | 72.7 °F | 4.2 in. |
| May | 59.6 °F | 80.2 °F | 3.58 in. |
| June | 67.2 °F | 86.1 °F | 4.38 in. |
| July | 70.4 °F | 89.0 °F | 5.03 in. |
| August | 69.7 °F | 88.1 °F | 4.36 in. |
| September | 64.0 °F | 83.0 °F | 3.89 in. |
| October | 52.6 °F | 73.5 °F | 3.54 in. |
| November | 41.5 °F | 63.4 °F | 4.13 in. |
| December | 36.0 °F | 55.5 °F | 4.84 in. |
| Annual | 51.9 °F | 72.2 °F | 52.7 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |