Columbia, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.6 °C (low) to 19.8 °C (high). Annual precipitation averages 1308.1 Millimeters. Columbia 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 | -3.4 °C | 7 °C | 101.09 mm |
| February | -1.8 °C | 9.4 °C | 92.71 mm |
| March | 1.6 °C | 14.4 °C | 131.32 mm |
| April | 6.8 °C | 20.2 °C | 118.11 mm |
| May | 12.4 °C | 24.8 °C | 128.27 mm |
| June | 16.8 °C | 28.9 °C | 125.22 mm |
| July | 18.8 °C | 30.6 °C | 126.24 mm |
| August | 17.9 °C | 30.3 °C | 99.06 mm |
| September | 14.1 °C | 27.7 °C | 95.25 mm |
| October | 7.3 °C | 21.3 °C | 80.01 mm |
| November | 1.8 °C | 14.6 °C | 89.92 mm |
| December | -1.3 °C | 8.9 °C | 120.9 mm |
| Annual | 7.6 °C | 19.8 °C | 1308.1 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |