Caledonia, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.1 °F (low) to 54.6 °F (high). Annual precipitation averages 37.3 Inches. Caledonia is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.8 °F | 24.0 °F | 1.14 in. |
| February | 11.1 °F | 28.5 °F | 1.09 in. |
| March | 23.4 °F | 41.3 °F | 1.84 in. |
| April | 35.0 °F | 55.3 °F | 4.11 in. |
| May | 47.1 °F | 67.4 °F | 4.73 in. |
| June | 57.7 °F | 77.0 °F | 6.09 in. |
| July | 61.4 °F | 80.5 °F | 4.21 in. |
| August | 59.0 °F | 78.6 °F | 4.44 in. |
| September | 50.6 °F | 71.8 °F | 3.76 in. |
| October | 38.5 °F | 58.3 °F | 2.8 in. |
| November | 26.5 °F | 42.6 °F | 1.71 in. |
| December | 14.9 °F | 29.7 °F | 1.42 in. |
| Annual | 36.1 °F | 54.6 °F | 37.34 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |