McKinney, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.5 °F (low) to 66.1 °F (high). Annual precipitation averages 50.7 Inches. McKinney 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 | 25.2 °F | 43.0 °F | 3.91 in. |
| February | 28.2 °F | 47.2 °F | 3.78 in. |
| March | 34.8 °F | 56.4 °F | 4.86 in. |
| April | 44.3 °F | 67.0 °F | 4.66 in. |
| May | 54.4 °F | 75.0 °F | 5.2 in. |
| June | 62.3 °F | 82.8 °F | 5.29 in. |
| July | 65.9 °F | 85.5 °F | 4.59 in. |
| August | 63.9 °F | 85.2 °F | 3.53 in. |
| September | 57.1 °F | 79.7 °F | 3.91 in. |
| October | 46.0 °F | 68.7 °F | 3.28 in. |
| November | 35.1 °F | 56.3 °F | 3.29 in. |
| December | 29.1 °F | 46.3 °F | 4.4 in. |
| Annual | 45.5 °F | 66.1 °F | 50.7 in. |
| 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 : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |