Bardstown, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.5 °C (low) to 19.5 °C (high). Annual precipitation averages 1290.3 Millimeters. Bardstown 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.9 °C | 6.3 °C | 92.2 mm |
| February | -2.3 °C | 8.6 °C | 97.79 mm |
| March | 1.4 °C | 13.8 °C | 121.92 mm |
| April | 6.7 °C | 19.8 °C | 120.4 mm |
| May | 12.3 °C | 24.8 °C | 136.91 mm |
| June | 17.2 °C | 29.2 °C | 128.52 mm |
| July | 19.1 °C | 30.5 °C | 112.27 mm |
| August | 17.8 °C | 30.3 °C | 88.39 mm |
| September | 13.9 °C | 27.3 °C | 93.22 mm |
| October | 7.7 °C | 21 °C | 95.5 mm |
| November | 1.8 °C | 13.8 °C | 90.42 mm |
| December | -1.7 °C | 8.2 °C | 112.78 mm |
| Annual | 7.5 °C | 19.5 °C | 1290.32 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |