Milledgeville, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.1 °C (low) to 24.6 °C (high). Annual precipitation averages 1206 Millimeters. Milledgeville 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 | 1.2 °C | 14.4 °C | 107.7 mm |
| February | 2.3 °C | 16.4 °C | 105.66 mm |
| March | 5.8 °C | 20.6 °C | 118.62 mm |
| April | 9.9 °C | 25.1 °C | 89.41 mm |
| May | 14.9 °C | 28.9 °C | 76.2 mm |
| June | 19.5 °C | 32.2 °C | 110.74 mm |
| July | 21.6 °C | 33.9 °C | 104.65 mm |
| August | 21.1 °C | 33 °C | 118.87 mm |
| September | 17.9 °C | 30.3 °C | 107.95 mm |
| October | 11.2 °C | 25.3 °C | 68.58 mm |
| November | 5.2 °C | 19.9 °C | 85.85 mm |
| December | 2.4 °C | 15.6 °C | 111.76 mm |
| Annual | 11.1 °C | 24.6 °C | 1205.99 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 |