Summerfield, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.2 °C (low) to 16.5 °C (high). Annual precipitation averages 1078.2 Millimeters. Summerfield 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.5 °C | 2.7 °C | 81.79 mm |
| February | -5.4 °C | 4.6 °C | 65.53 mm |
| March | -1.5 °C | 9.9 °C | 82.8 mm |
| April | 4.2 °C | 17.3 °C | 98.55 mm |
| May | 9.6 °C | 22 °C | 104.39 mm |
| June | 14.6 °C | 26.3 °C | 118.36 mm |
| July | 17.1 °C | 28.3 °C | 104.65 mm |
| August | 15.5 °C | 27.7 °C | 92.96 mm |
| September | 11.7 °C | 24.6 °C | 89.15 mm |
| October | 5.5 °C | 17.9 °C | 77.72 mm |
| November | 0.7 °C | 11.2 °C | 79.5 mm |
| December | -3.4 °C | 5.2 °C | 82.8 mm |
| Annual | 5.2 °C | 16.5 °C | 1078.2 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |