The Plains, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 17.8 °C (high). Annual precipitation averages 1066.3 Millimeters. The Plains 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 | -6.4 °C | 3.9 °C | 82.04 mm |
| February | -5.5 °C | 5.9 °C | 70.1 mm |
| March | -1.6 °C | 11.3 °C | 93.98 mm |
| April | 4.1 °C | 19 °C | 96.27 mm |
| May | 9.9 °C | 23.6 °C | 106.68 mm |
| June | 14.8 °C | 27.8 °C | 106.68 mm |
| July | 16.8 °C | 29.5 °C | 110.74 mm |
| August | 16 °C | 29.1 °C | 83.31 mm |
| September | 11.7 °C | 25.4 °C | 84.33 mm |
| October | 4.8 °C | 19.3 °C | 75.18 mm |
| November | -0.2 °C | 12.6 °C | 76.45 mm |
| December | -3.4 °C | 6.5 °C | 80.52 mm |
| Annual | 5.1 °C | 17.8 °C | 1066.28 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 |