Amelia, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.3 °C (low) to 17.8 °C (high). Annual precipitation averages 1136.6 Millimeters. Amelia is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.8 °C | 3.8 °C | 80.77 mm |
| February | -3.6 °C | 6.2 °C | 73.66 mm |
| March | 0.8 °C | 11.6 °C | 105.66 mm |
| April | 6.7 °C | 18.3 °C | 113.79 mm |
| May | 12.4 °C | 23.3 °C | 124.97 mm |
| June | 17.2 °C | 28 °C | 113.03 mm |
| July | 18.9 °C | 29.6 °C | 114.05 mm |
| August | 18.1 °C | 29.3 °C | 89.15 mm |
| September | 14.2 °C | 25.9 °C | 75.44 mm |
| October | 7.8 °C | 19.4 °C | 76.2 mm |
| November | 2.1 °C | 12 °C | 81.53 mm |
| December | -1.9 °C | 6.2 °C | 88.39 mm |
| Annual | 7.3 °C | 17.8 °C | 1136.64 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |