Lewisport, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.7 °F (low) to 67.5 °F (high). Annual precipitation averages 49.7 Inches. Lewisport is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.6 °F | 42.4 °F | 3.6 in. |
| February | 27.7 °F | 46.9 °F | 3.61 in. |
| March | 35.5 °F | 56.5 °F | 4.55 in. |
| April | 45.4 °F | 68.2 °F | 5.01 in. |
| May | 56.1 °F | 77.5 °F | 5.34 in. |
| June | 64.5 °F | 85.4 °F | 4.74 in. |
| July | 68.0 °F | 88.2 °F | 4.21 in. |
| August | 66.0 °F | 87.8 °F | 3.07 in. |
| September | 58.6 °F | 82.2 °F | 3.65 in. |
| October | 46.9 °F | 70.8 °F | 3.73 in. |
| November | 36.6 °F | 57.0 °F | 3.93 in. |
| December | 29.6 °F | 46.5 °F | 4.3 in. |
| Annual | 46.7 °F | 67.5 °F | 49.74 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |