Belle Valley, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 63.4 °F (high). Annual precipitation averages 41.4 Inches. Belle Valley is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.3 °F | 38.3 °F | 3.08 in. |
| February | 22.2 °F | 41.8 °F | 2.35 in. |
| March | 29.2 °F | 51.8 °F | 3.24 in. |
| April | 39.3 °F | 65.4 °F | 3.77 in. |
| May | 49.8 °F | 73.8 °F | 4.11 in. |
| June | 58.5 °F | 81.2 °F | 4.72 in. |
| July | 62.7 °F | 84.5 °F | 4.1 in. |
| August | 60.9 °F | 83.7 °F | 3.65 in. |
| September | 53.3 °F | 77.8 °F | 3.58 in. |
| October | 41.6 °F | 66.1 °F | 2.86 in. |
| November | 31.7 °F | 53.7 °F | 2.95 in. |
| December | 25.9 °F | 42.9 °F | 2.96 in. |
| Annual | 41.3 °F | 63.4 °F | 41.37 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |