Nelsonville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.4 °C (low) to 17.7 °C (high). Annual precipitation averages 1052.8 Millimeters. Nelsonville 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 | -7.2 °C | 3.8 °C | 80.52 mm |
| February | -6.3 °C | 5.7 °C | 68.07 mm |
| March | -2.3 °C | 11.2 °C | 91.69 mm |
| April | 3.2 °C | 18.7 °C | 95.5 mm |
| May | 9.1 °C | 23.4 °C | 104.65 mm |
| June | 14.2 °C | 27.7 °C | 109.22 mm |
| July | 16.4 °C | 29.5 °C | 111.25 mm |
| August | 15.4 °C | 29.1 °C | 86.36 mm |
| September | 11 °C | 25.5 °C | 80.01 mm |
| October | 4.1 °C | 19.2 °C | 74.17 mm |
| November | -0.9 °C | 12.3 °C | 72.9 mm |
| December | -4.2 °C | 6.3 °C | 78.49 mm |
| Annual | 4.4 °C | 17.7 °C | 1052.83 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |