Rossmoyne, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.9 °F (low) to 64.6 °F (high). Annual precipitation averages 44.4 Inches. Rossmoyne 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 | 23.3 °F | 39.2 °F | 3.31 in. |
| February | 25.1 °F | 43.4 °F | 2.85 in. |
| March | 33.4 °F | 53.2 °F | 3.92 in. |
| April | 43.8 °F | 65.8 °F | 4.57 in. |
| May | 53.9 °F | 74.7 °F | 4.9 in. |
| June | 62.8 °F | 83.2 °F | 4.5 in. |
| July | 65.8 °F | 86.0 °F | 3.97 in. |
| August | 64.3 °F | 85.7 °F | 3.5 in. |
| September | 57.1 °F | 79.3 °F | 2.94 in. |
| October | 45.6 °F | 67.7 °F | 3.17 in. |
| November | 35.3 °F | 53.8 °F | 3.3 in. |
| December | 28.1 °F | 43.2 °F | 3.48 in. |
| Annual | 44.9 °F | 64.6 °F | 44.41 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 |