Caledonia, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.9 °F (low) to 59.9 °F (high). Annual precipitation averages 40 Inches. 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 | 18.3 °F | 33.3 °F | 2.94 in. |
| February | 20.0 °F | 36.2 °F | 2.18 in. |
| March | 28.3 °F | 46.5 °F | 2.81 in. |
| April | 38.9 °F | 60.2 °F | 3.92 in. |
| May | 50.1 °F | 71.0 °F | 4.22 in. |
| June | 59.6 °F | 79.7 °F | 4.51 in. |
| July | 62.6 °F | 82.9 °F | 4.04 in. |
| August | 60.7 °F | 81.3 °F | 3.43 in. |
| September | 53.2 °F | 75.6 °F | 3.26 in. |
| October | 42.3 °F | 63.2 °F | 2.87 in. |
| November | 32.5 °F | 50.0 °F | 2.96 in. |
| December | 24.2 °F | 38.4 °F | 2.86 in. |
| Annual | 40.9 °F | 59.9 °F | 40 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |