Russellville, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 20.1 °C (high). Annual precipitation averages 1356.6 Millimeters. Russellville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 6.8 °C | 97.79 mm |
| February | -1.6 °C | 9.4 °C | 112.52 mm |
| March | 2.3 °C | 14.5 °C | 120.9 mm |
| April | 7.6 °C | 20.4 °C | 131.83 mm |
| May | 13.2 °C | 25.1 °C | 139.19 mm |
| June | 17.9 °C | 29.7 °C | 115.82 mm |
| July | 19.9 °C | 31.4 °C | 112.27 mm |
| August | 18.7 °C | 30.8 °C | 101.09 mm |
| September | 14.7 °C | 27.6 °C | 103.63 mm |
| October | 8.3 °C | 21.7 °C | 96.01 mm |
| November | 2.3 °C | 14.6 °C | 101.6 mm |
| December | -1.2 °C | 8.8 °C | 123.95 mm |
| Annual | 8.2 °C | 20.1 °C | 1356.6 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Cfa - Humid Subtropical Climate |