Lowellville, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.6 °C (low) to 16.4 °C (high). Annual precipitation averages 1050.5 Millimeters. Lowellville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.9 °C | 2.1 °C | 75.44 mm |
| February | -6.6 °C | 3.8 °C | 58.67 mm |
| March | -2.3 °C | 9 °C | 77.47 mm |
| April | 3.1 °C | 16.5 °C | 95.5 mm |
| May | 8.8 °C | 22.3 °C | 98.3 mm |
| June | 13.8 °C | 26.9 °C | 111.25 mm |
| July | 16.2 °C | 29.1 °C | 113.28 mm |
| August | 15.3 °C | 28.3 °C | 91.19 mm |
| September | 11.6 °C | 24.8 °C | 97.54 mm |
| October | 5.5 °C | 17.8 °C | 81.28 mm |
| November | 0.6 °C | 10.8 °C | 73.91 mm |
| December | -3.6 °C | 4.8 °C | 76.71 mm |
| Annual | 4.6 °C | 16.4 °C | 1050.54 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 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 | Dfb - Humid Continental Mild Summer, Wet All Year |