Carrollton, Kentucky has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45 °F (low) to 66.4 °F (high). Annual precipitation averages 48.6 Inches. Carrollton is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.5 °F | 41.3 °F | 3.51 in. |
| February | 26.4 °F | 45.7 °F | 3.36 in. |
| March | 33.7 °F | 55.6 °F | 4.26 in. |
| April | 43.3 °F | 67.6 °F | 4.74 in. |
| May | 53.1 °F | 75.9 °F | 5.37 in. |
| June | 61.4 °F | 83.9 °F | 5.17 in. |
| July | 66.0 °F | 87.3 °F | 4.13 in. |
| August | 65.0 °F | 86.5 °F | 3.77 in. |
| September | 57.6 °F | 80.8 °F | 3.45 in. |
| October | 45.4 °F | 70.0 °F | 3.32 in. |
| November | 35.1 °F | 56.3 °F | 3.51 in. |
| December | 28.6 °F | 45.6 °F | 4.02 in. |
| Annual | 45 °F | 66.4 °F | 48.61 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |