Carrollton, Kentucky has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.2 °C (low) to 19.1 °C (high). Annual precipitation averages 1234.7 Millimeters. 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 | -4.2 °C | 5.2 °C | 89.15 mm |
| February | -3.1 °C | 7.6 °C | 85.34 mm |
| March | 0.9 °C | 13.1 °C | 108.2 mm |
| April | 6.3 °C | 19.8 °C | 120.4 mm |
| May | 11.7 °C | 24.4 °C | 136.4 mm |
| June | 16.3 °C | 28.8 °C | 131.32 mm |
| July | 18.9 °C | 30.7 °C | 104.9 mm |
| August | 18.3 °C | 30.3 °C | 95.76 mm |
| September | 14.2 °C | 27.1 °C | 87.63 mm |
| October | 7.4 °C | 21.1 °C | 84.33 mm |
| November | 1.7 °C | 13.5 °C | 89.15 mm |
| December | -1.9 °C | 7.6 °C | 102.11 mm |
| Annual | 7.2 °C | 19.1 °C | 1234.69 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |