Sycamore, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 19.3 °C (high). Annual precipitation averages 1279.4 Millimeters. Sycamore 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 | -3.7 °C | 5.6 °C | 95.76 mm |
| February | -2.3 °C | 8.1 °C | 92.96 mm |
| March | 1.9 °C | 13.5 °C | 119.13 mm |
| April | 7.6 °C | 19.9 °C | 126.49 mm |
| May | 13.3 °C | 24.6 °C | 133.86 mm |
| June | 17.7 °C | 28.9 °C | 125.98 mm |
| July | 19.7 °C | 30.7 °C | 112.01 mm |
| August | 19 °C | 30.4 °C | 86.11 mm |
| September | 15 °C | 27.2 °C | 89.15 mm |
| October | 8.4 °C | 21.1 °C | 92.46 mm |
| November | 2.6 °C | 13.7 °C | 94.74 mm |
| December | -1.4 °C | 7.7 °C | 110.74 mm |
| Annual | 8.2 °C | 19.3 °C | 1279.39 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 |