Wintersville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 16.8 °C (high). Annual precipitation averages 1078 Millimeters. Wintersville 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 | -5.9 °C | 3.1 °C | 83.57 mm |
| February | -5.2 °C | 4.7 °C | 64.01 mm |
| March | -1.1 °C | 10.1 °C | 84.33 mm |
| April | 4.8 °C | 17.4 °C | 94.23 mm |
| May | 10.1 °C | 22.5 °C | 102.62 mm |
| June | 15 °C | 26.7 °C | 118.11 mm |
| July | 17.1 °C | 28.5 °C | 106.68 mm |
| August | 16.2 °C | 28.2 °C | 92.46 mm |
| September | 12.6 °C | 24.8 °C | 94.74 mm |
| October | 6.3 °C | 18.2 °C | 80.01 mm |
| November | 1.2 °C | 11.4 °C | 76.45 mm |
| December | -3.1 °C | 5.4 °C | 80.77 mm |
| Annual | 5.7 °C | 16.8 °C | 1077.98 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |