Brandenburg, 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 1269.2 Millimeters. Brandenburg 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 | -4.3 °C | 5.9 °C | 92.2 mm |
| February | -2.8 °C | 8.4 °C | 92.71 mm |
| March | 1.2 °C | 13.8 °C | 121.67 mm |
| April | 6.7 °C | 20.1 °C | 124.46 mm |
| May | 12.4 °C | 24.7 °C | 141.22 mm |
| June | 17.2 °C | 29.2 °C | 114.05 mm |
| July | 19.3 °C | 30.8 °C | 107.19 mm |
| August | 18.2 °C | 30.3 °C | 82.04 mm |
| September | 14.1 °C | 27.3 °C | 92.96 mm |
| October | 7.8 °C | 21.3 °C | 92.46 mm |
| November | 1.6 °C | 13.9 °C | 92.2 mm |
| December | -1.9 °C | 7.9 °C | 116.08 mm |
| Annual | 7.5 °C | 19.5 °C | 1269.24 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 |