Gratz, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44 °F (low) to 66.1 °F (high). Annual precipitation averages 48.1 Inches. Gratz is located in USDA Plant Hardiness Zone 6b. 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 | 23.3 °F | 41.2 °F | 3.48 in. |
| February | 25.2 °F | 45.5 °F | 3.34 in. |
| March | 32.5 °F | 55.2 °F | 4.34 in. |
| April | 42.3 °F | 67.4 °F | 4.71 in. |
| May | 52.5 °F | 75.8 °F | 5.48 in. |
| June | 61.0 °F | 83.6 °F | 4.81 in. |
| July | 65.2 °F | 87.0 °F | 4.44 in. |
| August | 63.8 °F | 86.2 °F | 3.83 in. |
| September | 56.4 °F | 80.5 °F | 3.34 in. |
| October | 44.8 °F | 69.4 °F | 3.39 in. |
| November | 33.9 °F | 55.9 °F | 3.3 in. |
| December | 27.5 °F | 45.5 °F | 3.67 in. |
| Annual | 44 °F | 66.1 °F | 48.13 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 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 |