Brownsville, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.5 °C (low) to 20.1 °C (high). Annual precipitation averages 1356.4 Millimeters. Brownsville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.7 °C | 6.8 °C | 95.76 mm |
| February | -2.3 °C | 9.2 °C | 109.22 mm |
| March | 1.6 °C | 14.4 °C | 123.7 mm |
| April | 6.8 °C | 20.6 °C | 127 mm |
| May | 12.5 °C | 25.2 °C | 134.62 mm |
| June | 16.8 °C | 29.7 °C | 121.67 mm |
| July | 19 °C | 31.5 °C | 120.65 mm |
| August | 18.1 °C | 31 °C | 103.12 mm |
| September | 14.1 °C | 27.8 °C | 103.38 mm |
| October | 7.4 °C | 21.8 °C | 100.58 mm |
| November | 1.5 °C | 14.4 °C | 96.27 mm |
| December | -1.6 °C | 8.8 °C | 120.4 mm |
| Annual | 7.5 °C | 20.1 °C | 1356.37 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 |