Fort Oglethorpe, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.9 °F (low) to 71.5 °F (high). Annual precipitation averages 53.3 Inches. Fort Oglethorpe is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 30.1 °F | 50.3 °F | 4.91 in. |
| February | 32.8 °F | 54.7 °F | 4.82 in. |
| March | 39.2 °F | 63.1 °F | 5.2 in. |
| April | 47.1 °F | 72.6 °F | 4.84 in. |
| May | 56.5 °F | 79.7 °F | 3.89 in. |
| June | 64.7 °F | 86.3 °F | 3.7 in. |
| July | 68.4 °F | 89.2 °F | 4.22 in. |
| August | 67.5 °F | 89.0 °F | 3.41 in. |
| September | 61.0 °F | 84.0 °F | 4.92 in. |
| October | 48.6 °F | 73.7 °F | 3.4 in. |
| November | 37.6 °F | 62.0 °F | 4.54 in. |
| December | 32.9 °F | 53.0 °F | 5.46 in. |
| Annual | 48.9 °F | 71.5 °F | 53.31 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |