London, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.3 °C (low) to 19.2 °C (high). Annual precipitation averages 1323.3 Millimeters. London is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.9 °C | 6.6 °C | 111.51 mm |
| February | -2.2 °C | 8.8 °C | 103.38 mm |
| March | 1.6 °C | 13.9 °C | 127.25 mm |
| April | 6.7 °C | 19.9 °C | 119.13 mm |
| May | 12 °C | 24.3 °C | 121.16 mm |
| June | 16.4 °C | 28.1 °C | 123.95 mm |
| July | 18.5 °C | 29.7 °C | 129.79 mm |
| August | 17.7 °C | 29.3 °C | 88.9 mm |
| September | 13.8 °C | 26.5 °C | 92.71 mm |
| October | 7.2 °C | 20.7 °C | 85.85 mm |
| November | 1.3 °C | 14 °C | 91.44 mm |
| December | -1.6 °C | 8.6 °C | 128.27 mm |
| Annual | 7.3 °C | 19.2 °C | 1323.34 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |