Bentleyville, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.2 °F (low) to 59.4 °F (high). Annual precipitation averages 43.1 Inches. Bentleyville 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.6 °F | 34.3 °F | 3.12 in. |
| February | 20.3 °F | 36.7 °F | 2.39 in. |
| March | 27.8 °F | 45.4 °F | 3.27 in. |
| April | 38.8 °F | 58.5 °F | 3.89 in. |
| May | 49.3 °F | 70.3 °F | 4.08 in. |
| June | 58.5 °F | 78.6 °F | 4.2 in. |
| July | 62.4 °F | 82.8 °F | 4.23 in. |
| August | 60.7 °F | 81.1 °F | 3.76 in. |
| September | 53.9 °F | 74.5 °F | 4.0 in. |
| October | 43.4 °F | 62.2 °F | 3.68 in. |
| November | 34.2 °F | 49.8 °F | 3.27 in. |
| December | 26.0 °F | 38.9 °F | 3.23 in. |
| Annual | 41.2 °F | 59.4 °F | 43.12 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |