Caledonia, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.7 °C (low) to 19.3 °C (high). Annual precipitation averages 1157 Millimeters. Caledonia is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.4 °C | 5.7 °C | 66.29 mm |
| February | -3.7 °C | 8.7 °C | 68.83 mm |
| March | 0.8 °C | 13.9 °C | 96.52 mm |
| April | 6.3 °C | 20.1 °C | 137.67 mm |
| May | 11.7 °C | 24.4 °C | 133.6 mm |
| June | 16.4 °C | 28.7 °C | 108.97 mm |
| July | 18.7 °C | 30.8 °C | 96.77 mm |
| August | 17.7 °C | 30.6 °C | 88.65 mm |
| September | 13.3 °C | 26.7 °C | 91.95 mm |
| October | 6.7 °C | 20.8 °C | 86.11 mm |
| November | 1.1 °C | 13.4 °C | 104.9 mm |
| December | -3.2 °C | 7.4 °C | 76.71 mm |
| Annual | 6.7 °C | 19.3 °C | 1156.97 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |