Jeffersonville, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.6 °C (low) to 18.8 °C (high). Annual precipitation averages 1253.7 Millimeters. Jeffersonville 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °C | 5.7 °C | 89.41 mm |
| February | -3.1 °C | 8.1 °C | 90.68 mm |
| March | 0.5 °C | 13 °C | 112.52 mm |
| April | 6 °C | 19.3 °C | 114.05 mm |
| May | 11.6 °C | 23.9 °C | 131.57 mm |
| June | 15.9 °C | 28.2 °C | 123.7 mm |
| July | 18.2 °C | 29.8 °C | 137.41 mm |
| August | 17 °C | 29.4 °C | 91.69 mm |
| September | 13 °C | 26.6 °C | 94.74 mm |
| October | 6.2 °C | 20.2 °C | 80.01 mm |
| November | 0.7 °C | 13.3 °C | 81.79 mm |
| December | -2.4 °C | 7.7 °C | 106.17 mm |
| Annual | 6.6 °C | 18.8 °C | 1253.74 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |