Jeromesville, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.2 °C (low) to 15.5 °C (high). Annual precipitation averages 1025.1 Millimeters. Jeromesville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.1 °C | 0.9 °C | 74.42 mm |
| February | -7.3 °C | 2.6 °C | 56.13 mm |
| March | -2.9 °C | 8 °C | 76.2 mm |
| April | 3.1 °C | 15.7 °C | 95.5 mm |
| May | 9 °C | 21.5 °C | 107.19 mm |
| June | 14.2 °C | 26.3 °C | 117.6 mm |
| July | 16 °C | 28.2 °C | 103.38 mm |
| August | 15.1 °C | 27.5 °C | 89.66 mm |
| September | 10.9 °C | 24.2 °C | 83.82 mm |
| October | 4.9 °C | 17.2 °C | 77.72 mm |
| November | -0.3 °C | 9.8 °C | 73.15 mm |
| December | -4.7 °C | 3.6 °C | 70.36 mm |
| Annual | 4.2 °C | 15.5 °C | 1025.13 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |