Island, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 19.9 °C (high). Annual precipitation averages 1239.5 Millimeters. Island 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 | -3.4 °C | 6.3 °C | 92.46 mm |
| February | -1.9 °C | 8.9 °C | 96.52 mm |
| March | 2.4 °C | 14.2 °C | 116.08 mm |
| April | 7.8 °C | 20.4 °C | 121.16 mm |
| May | 13.3 °C | 25.2 °C | 131.32 mm |
| June | 18.1 °C | 29.4 °C | 109.73 mm |
| July | 19.9 °C | 31.1 °C | 113.54 mm |
| August | 18.7 °C | 31 °C | 78.99 mm |
| September | 14.6 °C | 28.1 °C | 85.6 mm |
| October | 8.2 °C | 21.8 °C | 89.92 mm |
| November | 2.2 °C | 14.3 °C | 93.22 mm |
| December | -1.4 °C | 8.4 °C | 111 mm |
| Annual | 8.2 °C | 19.9 °C | 1239.54 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 |