Caledonia, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 15.5 °C (high). Annual precipitation averages 1016 Millimeters. Caledonia 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 | -7.6 °C | 0.7 °C | 74.68 mm |
| February | -6.7 °C | 2.3 °C | 55.37 mm |
| March | -2.1 °C | 8.1 °C | 71.37 mm |
| April | 3.8 °C | 15.7 °C | 99.57 mm |
| May | 10.1 °C | 21.7 °C | 107.19 mm |
| June | 15.3 °C | 26.5 °C | 114.55 mm |
| July | 17 °C | 28.3 °C | 102.62 mm |
| August | 15.9 °C | 27.4 °C | 87.12 mm |
| September | 11.8 °C | 24.2 °C | 82.8 mm |
| October | 5.7 °C | 17.3 °C | 72.9 mm |
| November | 0.3 °C | 10 °C | 75.18 mm |
| December | -4.3 °C | 3.6 °C | 72.64 mm |
| Annual | 4.9 °C | 15.5 °C | 1015.99 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |