Negley, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 16.3 °C (high). Annual precipitation averages 1037.3 Millimeters. Negley is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.9 °C | 2.2 °C | 77.72 mm |
| February | -6.4 °C | 3.8 °C | 59.44 mm |
| March | -2.3 °C | 9.2 °C | 79.5 mm |
| April | 3.3 °C | 16.6 °C | 94.74 mm |
| May | 8.9 °C | 22.1 °C | 97.79 mm |
| June | 13.9 °C | 26.6 °C | 108.97 mm |
| July | 16.2 °C | 28.7 °C | 106.93 mm |
| August | 15.3 °C | 28.1 °C | 88.65 mm |
| September | 11.6 °C | 24.6 °C | 93.73 mm |
| October | 5.5 °C | 17.7 °C | 78.74 mm |
| November | 0.4 °C | 10.8 °C | 73.66 mm |
| December | -3.7 °C | 4.8 °C | 77.47 mm |
| Annual | 4.7 °C | 16.3 °C | 1037.34 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |