Caledonia, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 13.8 °C (high). Annual precipitation averages 911.8 Millimeters. Caledonia is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.1 °C | -1.4 °C | 45.97 mm |
| February | -8.4 °C | 0.5 °C | 43.43 mm |
| March | -3.4 °C | 6.3 °C | 53.34 mm |
| April | 2.3 °C | 12.8 °C | 102.36 mm |
| May | 8.3 °C | 19.2 °C | 104.39 mm |
| June | 13.9 °C | 24.7 °C | 113.79 mm |
| July | 16.9 °C | 27.6 °C | 87.12 mm |
| August | 16.3 °C | 26.8 °C | 91.44 mm |
| September | 11.8 °C | 23.2 °C | 84.84 mm |
| October | 5.3 °C | 16 °C | 76.2 mm |
| November | -0.9 °C | 8.3 °C | 58.67 mm |
| December | -6.6 °C | 1.6 °C | 50.29 mm |
| Annual | 3.8 °C | 13.8 °C | 911.84 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°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 |