Caledonia, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.1 °F (low) to 66.7 °F (high). Annual precipitation averages 45.6 Inches. 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 | 22.2 °F | 42.2 °F | 2.61 in. |
| February | 25.3 °F | 47.6 °F | 2.71 in. |
| March | 33.4 °F | 57.1 °F | 3.8 in. |
| April | 43.4 °F | 68.2 °F | 5.42 in. |
| May | 53.1 °F | 75.9 °F | 5.26 in. |
| June | 61.5 °F | 83.6 °F | 4.29 in. |
| July | 65.6 °F | 87.5 °F | 3.81 in. |
| August | 63.9 °F | 87.0 °F | 3.49 in. |
| September | 56.0 °F | 80.1 °F | 3.62 in. |
| October | 44.1 °F | 69.4 °F | 3.39 in. |
| November | 33.9 °F | 56.1 °F | 4.13 in. |
| December | 26.3 °F | 45.4 °F | 3.02 in. |
| Annual | 44.1 °F | 66.7 °F | 45.55 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |