Benton, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.3 °F (low) to 67.9 °F (high). Annual precipitation averages 51.1 Inches. Benton 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 | 25.5 °F | 42.6 °F | 3.62 in. |
| February | 28.7 °F | 47.9 °F | 3.69 in. |
| March | 36.9 °F | 57.7 °F | 4.68 in. |
| April | 46.8 °F | 68.9 °F | 5.54 in. |
| May | 56.9 °F | 77.6 °F | 5.96 in. |
| June | 65.4 °F | 86.1 °F | 4.28 in. |
| July | 68.9 °F | 89.1 °F | 4.25 in. |
| August | 66.7 °F | 88.2 °F | 2.9 in. |
| September | 58.9 °F | 82.2 °F | 3.35 in. |
| October | 47.2 °F | 71.3 °F | 3.75 in. |
| November | 36.9 °F | 57.3 °F | 4.88 in. |
| December | 29.3 °F | 46.0 °F | 4.17 in. |
| Annual | 47.3 °F | 67.9 °F | 51.07 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 |