Cecil, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.5 °C (low) to 15.6 °C (high). Annual precipitation averages 938 Millimeters. Cecil is located in USDA Plant Hardiness Zone 6a. 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 | -8.3 °C | 0.2 °C | 59.44 mm |
| February | -7.3 °C | 2.1 °C | 51.82 mm |
| March | -2.5 °C | 8.1 °C | 64.26 mm |
| April | 3 °C | 15.6 °C | 90.17 mm |
| May | 9.6 °C | 22.1 °C | 109.98 mm |
| June | 15.2 °C | 27.1 °C | 98.81 mm |
| July | 16.9 °C | 29.2 °C | 93.47 mm |
| August | 15.7 °C | 28 °C | 91.69 mm |
| September | 11.6 °C | 24.9 °C | 76.45 mm |
| October | 5.4 °C | 17.7 °C | 70.36 mm |
| November | -0.2 °C | 9.6 °C | 72.39 mm |
| December | -4.9 °C | 2.9 °C | 59.18 mm |
| Annual | 4.5 °C | 15.6 °C | 938.02 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |