Riverlea, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.6 °F (low) to 62.8 °F (high). Annual precipitation averages 40.9 Inches. Riverlea 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.5 °F | 36.4 °F | 2.98 in. |
| February | 23.3 °F | 39.8 °F | 2.39 in. |
| March | 31.6 °F | 50.5 °F | 3.36 in. |
| April | 41.9 °F | 63.9 °F | 3.89 in. |
| May | 52.8 °F | 74.1 °F | 4.19 in. |
| June | 61.8 °F | 82.3 °F | 4.52 in. |
| July | 65.2 °F | 85.1 °F | 4.12 in. |
| August | 63.3 °F | 84.0 °F | 3.39 in. |
| September | 56.1 °F | 78.3 °F | 3.2 in. |
| October | 44.5 °F | 65.8 °F | 2.83 in. |
| November | 34.3 °F | 52.2 °F | 2.95 in. |
| December | 27.1 °F | 41.1 °F | 3.08 in. |
| Annual | 43.6 °F | 62.8 °F | 40.9 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |