Wightmans Grove, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.6 °C (low) to 15.6 °C (high). Annual precipitation averages 959.9 Millimeters. Wightmans Grove 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 | -7.2 °C | 0.7 °C | 63.75 mm |
| February | -6.2 °C | 2.3 °C | 53.34 mm |
| March | -1.8 °C | 7.6 °C | 69.09 mm |
| April | 3.9 °C | 15.1 °C | 98.3 mm |
| May | 10.5 °C | 21.5 °C | 95.76 mm |
| June | 16.1 °C | 26.9 °C | 101.35 mm |
| July | 18 °C | 29.2 °C | 96.01 mm |
| August | 16.9 °C | 27.9 °C | 89.92 mm |
| September | 12.9 °C | 24.6 °C | 84.33 mm |
| October | 6.6 °C | 17.7 °C | 74.17 mm |
| November | 1 °C | 9.8 °C | 71.37 mm |
| December | -3.7 °C | 3.4 °C | 62.48 mm |
| Annual | 5.6 °C | 15.6 °C | 959.87 mm |
| 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 : -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 |