Caledonia, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.7 °C (low) to 13.8 °C (high). Annual precipitation averages 986 Millimeters. Caledonia is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.4 °C | -1.2 °C | 71.37 mm |
| February | -8.2 °C | 0.2 °C | 54.86 mm |
| March | -4.1 °C | 6 °C | 60.71 mm |
| April | 2 °C | 13.4 °C | 97.28 mm |
| May | 8.3 °C | 20 °C | 105.92 mm |
| June | 13.7 °C | 25.3 °C | 97.28 mm |
| July | 15.8 °C | 27.4 °C | 88.39 mm |
| August | 15 °C | 26.4 °C | 89.15 mm |
| September | 10.7 °C | 22.7 °C | 83.06 mm |
| October | 4.7 °C | 15.5 °C | 94.74 mm |
| November | -0.6 °C | 7.8 °C | 77.72 mm |
| December | -4.9 °C | 1.7 °C | 65.53 mm |
| Annual | 3.7 °C | 13.8 °C | 986.01 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |