Shelbyville, Kentucky has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.6 °F (low) to 65.8 °F (high). Annual precipitation averages 50.4 Inches. Shelbyville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.2 °F | 41.1 °F | 3.72 in. |
| February | 25.6 °F | 45.6 °F | 3.9 in. |
| March | 33.1 °F | 55.0 °F | 4.74 in. |
| April | 43.1 °F | 66.4 °F | 4.73 in. |
| May | 53.9 °F | 75.2 °F | 5.37 in. |
| June | 62.0 °F | 84.1 °F | 4.89 in. |
| July | 65.8 °F | 87.0 °F | 4.7 in. |
| August | 63.9 °F | 85.9 °F | 3.41 in. |
| September | 56.7 °F | 80.1 °F | 3.39 in. |
| October | 45.4 °F | 69.1 °F | 3.61 in. |
| November | 34.4 °F | 55.5 °F | 3.55 in. |
| December | 27.5 °F | 45.0 °F | 4.42 in. |
| Annual | 44.6 °F | 65.8 °F | 50.43 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |