New Vienna, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 16.7 °C (high). Annual precipitation averages 1138.7 Millimeters. New Vienna 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 | -5.9 °C | 2.7 °C | 83.57 mm |
| February | -4.7 °C | 4.7 °C | 72.64 mm |
| March | -0.2 °C | 10.2 °C | 101.09 mm |
| April | 5.3 °C | 17.1 °C | 116.33 mm |
| May | 11.6 °C | 22.4 °C | 122.17 mm |
| June | 16.3 °C | 27.1 °C | 120.14 mm |
| July | 17.7 °C | 28.6 °C | 110.24 mm |
| August | 16.6 °C | 28.1 °C | 88.65 mm |
| September | 12.7 °C | 25.3 °C | 80.26 mm |
| October | 6.8 °C | 18.4 °C | 78.49 mm |
| November | 1.2 °C | 11.3 °C | 78.74 mm |
| December | -3.1 °C | 4.9 °C | 86.36 mm |
| Annual | 6.2 °C | 16.7 °C | 1138.68 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 |