Lowellville, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.3 °F (low) to 61.4 °F (high). Annual precipitation averages 41.4 Inches. 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 | 19.5 °F | 35.8 °F | 2.97 in. |
| February | 20.2 °F | 38.8 °F | 2.31 in. |
| March | 27.8 °F | 48.2 °F | 3.05 in. |
| April | 37.6 °F | 61.7 °F | 3.76 in. |
| May | 47.9 °F | 72.1 °F | 3.87 in. |
| June | 56.9 °F | 80.5 °F | 4.38 in. |
| July | 61.1 °F | 84.3 °F | 4.46 in. |
| August | 59.5 °F | 83.0 °F | 3.59 in. |
| September | 52.8 °F | 76.7 °F | 3.84 in. |
| October | 41.9 °F | 64.1 °F | 3.2 in. |
| November | 33.0 °F | 51.4 °F | 2.91 in. |
| December | 25.5 °F | 40.6 °F | 3.02 in. |
| Annual | 40.3 °F | 61.4 °F | 41.36 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |