Benham, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44 °F (low) to 65.9 °F (high). Annual precipitation averages 52.9 Inches. Benham is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.7 °F | 44.2 °F | 4.17 in. |
| February | 27.4 °F | 48.1 °F | 4.22 in. |
| March | 33.7 °F | 56.8 °F | 5.06 in. |
| April | 42.7 °F | 67.0 °F | 4.92 in. |
| May | 51.4 °F | 74.4 °F | 4.71 in. |
| June | 59.2 °F | 81.8 °F | 4.59 in. |
| July | 63.3 °F | 84.2 °F | 5.6 in. |
| August | 62.2 °F | 82.6 °F | 4.36 in. |
| September | 55.9 °F | 78.9 °F | 3.81 in. |
| October | 44.3 °F | 67.5 °F | 3.07 in. |
| November | 34.0 °F | 57.1 °F | 3.6 in. |
| December | 28.9 °F | 47.8 °F | 4.82 in. |
| Annual | 44 °F | 65.9 °F | 52.93 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 |