Milledgeville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.9 °C (low) to 16.6 °C (high). Annual precipitation averages 1055.9 Millimeters. 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 | -6.2 °C | 2.2 °C | 75.18 mm |
| February | -5.2 °C | 4.2 °C | 63.5 mm |
| March | -0.6 °C | 9.8 °C | 91.95 mm |
| April | 5.1 °C | 16.9 °C | 105.66 mm |
| May | 11.3 °C | 22.6 °C | 116.59 mm |
| June | 16.2 °C | 27.2 °C | 113.79 mm |
| July | 17.7 °C | 28.4 °C | 107.44 mm |
| August | 16.4 °C | 28.1 °C | 81.79 mm |
| September | 12.5 °C | 25.3 °C | 71.88 mm |
| October | 6.3 °C | 18.6 °C | 76.2 mm |
| November | 0.7 °C | 10.9 °C | 74.42 mm |
| December | -3.4 °C | 4.6 °C | 77.47 mm |
| Annual | 5.9 °C | 16.6 °C | 1055.87 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |