Milledgeville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.6 °F (low) to 61.8 °F (high). Annual precipitation averages 41.6 Inches. Milledgeville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.8 °F | 35.9 °F | 2.96 in. |
| February | 22.7 °F | 39.5 °F | 2.5 in. |
| March | 30.9 °F | 49.6 °F | 3.62 in. |
| April | 41.1 °F | 62.4 °F | 4.16 in. |
| May | 52.3 °F | 72.6 °F | 4.59 in. |
| June | 61.1 °F | 80.9 °F | 4.48 in. |
| July | 63.8 °F | 83.2 °F | 4.23 in. |
| August | 61.6 °F | 82.5 °F | 3.22 in. |
| September | 54.5 °F | 77.6 °F | 2.83 in. |
| October | 43.4 °F | 65.4 °F | 3.0 in. |
| November | 33.2 °F | 51.6 °F | 2.93 in. |
| December | 25.9 °F | 40.2 °F | 3.05 in. |
| Annual | 42.6 °F | 61.8 °F | 41.57 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |