Unionville Center, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42 °F (low) to 61.8 °F (high). Annual precipitation averages 41.4 Inches. Unionville Center 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.0 °F | 35.2 °F | 2.89 in. |
| February | 21.9 °F | 38.7 °F | 2.32 in. |
| March | 30.0 °F | 49.4 °F | 3.15 in. |
| April | 40.3 °F | 62.5 °F | 4.01 in. |
| May | 51.4 °F | 73.3 °F | 4.43 in. |
| June | 60.5 °F | 81.4 °F | 4.7 in. |
| July | 63.6 °F | 84.1 °F | 4.45 in. |
| August | 61.4 °F | 83.0 °F | 3.56 in. |
| September | 54.2 °F | 77.8 °F | 3.24 in. |
| October | 42.8 °F | 65.3 °F | 2.78 in. |
| November | 32.8 °F | 51.3 °F | 2.98 in. |
| December | 25.6 °F | 39.9 °F | 2.91 in. |
| Annual | 42 °F | 61.8 °F | 41.42 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |