Chardon, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 14.4 °C (high). Annual precipitation averages 1257.1 Millimeters. Chardon is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.3 °C | 0.2 °C | 101.35 mm |
| February | -8.1 °C | 1.7 °C | 71.88 mm |
| March | -3.8 °C | 6.7 °C | 89.66 mm |
| April | 2.2 °C | 14.1 °C | 102.36 mm |
| May | 8.2 °C | 20.3 °C | 107.95 mm |
| June | 13.3 °C | 25.1 °C | 111.76 mm |
| July | 15.5 °C | 27.1 °C | 121.67 mm |
| August | 14.5 °C | 26.4 °C | 106.93 mm |
| September | 10.9 °C | 23.1 °C | 114.81 mm |
| October | 5.2 °C | 16.1 °C | 115.57 mm |
| November | 0.1 °C | 8.9 °C | 107.95 mm |
| December | -4.5 °C | 2.9 °C | 105.16 mm |
| Annual | 3.8 °C | 14.4 °C | 1257.05 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |