Tompkinsville, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.5 °C (low) to 19.9 °C (high). Annual precipitation averages 1373.4 Millimeters. Tompkinsville 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 | -2.7 °C | 7.1 °C | 108.46 mm |
| February | -1.1 °C | 9.6 °C | 114.55 mm |
| March | 2.7 °C | 14.6 °C | 131.57 mm |
| April | 8 °C | 20.3 °C | 127 mm |
| May | 13.3 °C | 24.6 °C | 130.3 mm |
| June | 17.7 °C | 29.1 °C | 120.4 mm |
| July | 19.4 °C | 30.7 °C | 133.1 mm |
| August | 18.8 °C | 30.2 °C | 95.76 mm |
| September | 15.2 °C | 27.4 °C | 98.04 mm |
| October | 8.3 °C | 21.7 °C | 89.92 mm |
| November | 2.7 °C | 14.7 °C | 96.01 mm |
| December | -0.5 °C | 9.1 °C | 128.27 mm |
| Annual | 8.5 °C | 19.9 °C | 1373.38 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |