Bethel, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.7 °F (low) to 64.2 °F (high). Annual precipitation averages 45.7 Inches. Bethel is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.1 °F | 39.4 °F | 3.19 in. |
| February | 25.7 °F | 43.7 °F | 3.04 in. |
| March | 33.4 °F | 53.2 °F | 4.34 in. |
| April | 43.5 °F | 65.0 °F | 4.59 in. |
| May | 54.0 °F | 74.0 °F | 4.86 in. |
| June | 62.1 °F | 82.3 °F | 4.56 in. |
| July | 65.4 °F | 85.3 °F | 4.65 in. |
| August | 64.1 °F | 84.8 °F | 3.66 in. |
| September | 56.8 °F | 78.7 °F | 3.08 in. |
| October | 44.9 °F | 67.1 °F | 2.97 in. |
| November | 35.2 °F | 53.8 °F | 3.21 in. |
| December | 28.3 °F | 43.5 °F | 3.52 in. |
| Annual | 44.7 °F | 64.2 °F | 45.67 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |