Rosemount, Ohio has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43 °F (low) to 65.8 °F (high). Annual precipitation averages 42.4 Inches. Rosemount is located in USDA Plant Hardiness Zone 7a. 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 | 22.9 °F | 41.1 °F | 3.36 in. |
| February | 24.8 °F | 45.1 °F | 3.01 in. |
| March | 31.4 °F | 54.7 °F | 3.97 in. |
| April | 41.1 °F | 67.3 °F | 3.94 in. |
| May | 51.5 °F | 75.6 °F | 4.46 in. |
| June | 60.2 °F | 83.3 °F | 4.15 in. |
| July | 64.0 °F | 86.4 °F | 4.29 in. |
| August | 62.2 °F | 86.0 °F | 3.14 in. |
| September | 54.8 °F | 80.2 °F | 3.2 in. |
| October | 43.2 °F | 68.7 °F | 2.91 in. |
| November | 32.9 °F | 55.6 °F | 2.63 in. |
| December | 27.4 °F | 45.1 °F | 3.29 in. |
| Annual | 43 °F | 65.8 °F | 42.35 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |