Flemingsburg, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.8 °C (low) to 18.4 °C (high). Annual precipitation averages 1225.3 Millimeters. Flemingsburg is located in USDA Plant Hardiness Zone 6b. 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 | -4.7 °C | 4.9 °C | 86.87 mm |
| February | -3.3 °C | 7.3 °C | 85.34 mm |
| March | 0.6 °C | 12.4 °C | 120.14 mm |
| April | 6.1 °C | 19 °C | 112.01 mm |
| May | 11.7 °C | 23.8 °C | 124.71 mm |
| June | 16.2 °C | 28.2 °C | 117.6 mm |
| July | 18.3 °C | 29.9 °C | 134.62 mm |
| August | 17.2 °C | 29.4 °C | 87.38 mm |
| September | 13.4 °C | 26.4 °C | 90.93 mm |
| October | 6.8 °C | 19.8 °C | 80.52 mm |
| November | 1.3 °C | 12.7 °C | 83.06 mm |
| December | -2.1 °C | 7.3 °C | 102.11 mm |
| Annual | 6.8 °C | 18.4 °C | 1225.29 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 6b : -20.6°C to -17.8°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 |