Benton, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.8 °F (low) to 68.9 °F (high). Annual precipitation averages 52.9 Inches. Benton is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.0 °F | 44.9 °F | 3.94 in. |
| February | 29.7 °F | 49.5 °F | 4.24 in. |
| March | 37.8 °F | 59.3 °F | 4.87 in. |
| April | 47.0 °F | 70.2 °F | 5.15 in. |
| May | 56.8 °F | 78.2 °F | 5.67 in. |
| June | 65.3 °F | 85.9 °F | 4.83 in. |
| July | 69.0 °F | 89.3 °F | 4.33 in. |
| August | 66.8 °F | 88.9 °F | 3.49 in. |
| September | 59.3 °F | 82.8 °F | 3.58 in. |
| October | 47.6 °F | 71.3 °F | 3.76 in. |
| November | 37.0 °F | 58.6 °F | 4.0 in. |
| December | 29.8 °F | 48.3 °F | 4.99 in. |
| Annual | 47.8 °F | 68.9 °F | 52.85 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |