Frankfort, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.2 °F (low) to 66.4 °F (high). Annual precipitation averages 48.7 Inches. Frankfort 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.4 °F | 41.9 °F | 3.5 in. |
| February | 24.5 °F | 46.4 °F | 3.57 in. |
| March | 31.7 °F | 55.7 °F | 4.54 in. |
| April | 41.1 °F | 66.9 °F | 4.61 in. |
| May | 51.6 °F | 75.5 °F | 5.13 in. |
| June | 60.3 °F | 83.4 °F | 4.88 in. |
| July | 64.8 °F | 87.0 °F | 4.88 in. |
| August | 62.6 °F | 86.6 °F | 3.25 in. |
| September | 55.2 °F | 81.0 °F | 3.54 in. |
| October | 43.5 °F | 69.6 °F | 3.41 in. |
| November | 33.2 °F | 56.2 °F | 3.31 in. |
| December | 27.1 °F | 46.0 °F | 4.04 in. |
| Annual | 43.2 °F | 66.4 °F | 48.66 in. |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |