Edgerton, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.3 °C (low) to 15.5 °C (high). Annual precipitation averages 945.2 Millimeters. Edgerton is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.3 °C | 0.1 °C | 59.44 mm |
| February | -7.4 °C | 2.1 °C | 50.55 mm |
| March | -2.8 °C | 8.1 °C | 64.26 mm |
| April | 2.8 °C | 15.6 °C | 93.73 mm |
| May | 9.3 °C | 21.9 °C | 109.22 mm |
| June | 14.8 °C | 27.1 °C | 97.03 mm |
| July | 16.6 °C | 29.1 °C | 93.22 mm |
| August | 15.4 °C | 27.9 °C | 91.69 mm |
| September | 11.3 °C | 24.7 °C | 78.49 mm |
| October | 5.2 °C | 17.4 °C | 72.14 mm |
| November | -0.4 °C | 9.4 °C | 75.18 mm |
| December | -5.2 °C | 2.8 °C | 60.2 mm |
| Annual | 4.3 °C | 15.5 °C | 945.15 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |