Calhoun, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.9 °F (low) to 67.3 °F (high). Annual precipitation averages 46.3 Inches. Calhoun 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 | 25.6 °F | 42.4 °F | 3.56 in. |
| February | 28.4 °F | 46.9 °F | 3.62 in. |
| March | 36.4 °F | 56.5 °F | 4.47 in. |
| April | 46.0 °F | 68.3 °F | 4.54 in. |
| May | 56.7 °F | 76.8 °F | 4.92 in. |
| June | 65.0 °F | 84.8 °F | 4.06 in. |
| July | 68.3 °F | 87.9 °F | 4.53 in. |
| August | 65.7 °F | 87.1 °F | 2.81 in. |
| September | 58.3 °F | 82.3 °F | 3.14 in. |
| October | 47.4 °F | 71.1 °F | 3.01 in. |
| November | 35.9 °F | 56.8 °F | 3.38 in. |
| December | 29.2 °F | 46.3 °F | 4.22 in. |
| Annual | 46.9 °F | 67.3 °F | 46.26 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |