Caledonia, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.8 °F (low) to 56.8 °F (high). Annual precipitation averages 35.9 Inches. 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 | 13.9 °F | 29.4 °F | 1.81 in. |
| February | 16.8 °F | 32.9 °F | 1.71 in. |
| March | 25.9 °F | 43.3 °F | 2.1 in. |
| April | 36.2 °F | 55.1 °F | 4.03 in. |
| May | 47.0 °F | 66.5 °F | 4.11 in. |
| June | 57.1 °F | 76.5 °F | 4.48 in. |
| July | 62.4 °F | 81.6 °F | 3.43 in. |
| August | 61.3 °F | 80.2 °F | 3.6 in. |
| September | 53.3 °F | 73.7 °F | 3.34 in. |
| October | 41.6 °F | 60.8 °F | 3.0 in. |
| November | 30.4 °F | 47.0 °F | 2.31 in. |
| December | 20.2 °F | 34.8 °F | 1.98 in. |
| Annual | 38.8 °F | 56.8 °F | 35.9 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |