Shelbyville, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.9 °F (low) to 63.4 °F (high). Annual precipitation averages 41.7 Inches. Shelbyville is located in USDA Plant Hardiness Zone 6a. 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 | 17.9 °F | 35.5 °F | 1.65 in. |
| February | 21.3 °F | 40.4 °F | 1.89 in. |
| March | 31.3 °F | 52.5 °F | 2.65 in. |
| April | 42.1 °F | 64.4 °F | 4.07 in. |
| May | 53.1 °F | 73.8 °F | 5.69 in. |
| June | 62.8 °F | 83.0 °F | 5.17 in. |
| July | 66.4 °F | 86.9 °F | 4.73 in. |
| August | 64.1 °F | 85.5 °F | 4.04 in. |
| September | 55.4 °F | 78.7 °F | 4.01 in. |
| October | 44.1 °F | 66.8 °F | 3.33 in. |
| November | 32.9 °F | 52.6 °F | 2.64 in. |
| December | 23.4 °F | 40.3 °F | 1.83 in. |
| Annual | 42.9 °F | 63.4 °F | 41.7 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |