Riverside, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.7 °F (low) to 63.3 °F (high). Annual precipitation averages 41.4 Inches. Riverside 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 | 21.5 °F | 37.1 °F | 3.14 in. |
| February | 23.7 °F | 40.9 °F | 2.35 in. |
| March | 31.6 °F | 51.0 °F | 3.43 in. |
| April | 42.2 °F | 64.1 °F | 4.35 in. |
| May | 53.4 °F | 74.2 °F | 4.45 in. |
| June | 62.3 °F | 82.7 °F | 4.51 in. |
| July | 65.4 °F | 85.6 °F | 4.07 in. |
| August | 63.6 °F | 84.8 °F | 2.96 in. |
| September | 55.9 °F | 78.6 °F | 3.08 in. |
| October | 44.1 °F | 66.4 °F | 2.9 in. |
| November | 34.0 °F | 52.6 °F | 3.01 in. |
| December | 26.5 °F | 41.5 °F | 3.1 in. |
| Annual | 43.7 °F | 63.3 °F | 41.35 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |