Painesville, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 6 °C (low) to 14.5 °C (high). Annual precipitation averages 1095.5 Millimeters. Painesville 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.1 °C | 1.3 °C | 82.55 mm |
| February | -5.9 °C | 2.2 °C | 58.42 mm |
| March | -2.3 °C | 6.4 °C | 75.95 mm |
| April | 3.9 °C | 13.6 °C | 93.47 mm |
| May | 10.1 °C | 19.7 °C | 93.73 mm |
| June | 15.5 °C | 24.6 °C | 97.28 mm |
| July | 18.1 °C | 26.7 °C | 110.49 mm |
| August | 17.3 °C | 26.1 °C | 96.01 mm |
| September | 13.7 °C | 22.9 °C | 105.41 mm |
| October | 7.9 °C | 16.4 °C | 105.16 mm |
| November | 2.4 °C | 9.9 °C | 90.93 mm |
| December | -2.5 °C | 4.1 °C | 86.11 mm |
| Annual | 6 °C | 14.5 °C | 1095.51 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |