Lake Benton, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.7 °F (low) to 53.3 °F (high). Annual precipitation averages 28.2 Inches. Lake Benton is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.9 °F | 22.0 °F | 0.67 in. |
| February | 8.7 °F | 26.7 °F | 0.78 in. |
| March | 20.3 °F | 38.7 °F | 1.41 in. |
| April | 32.5 °F | 53.4 °F | 2.85 in. |
| May | 45.5 °F | 66.4 °F | 3.87 in. |
| June | 56.5 °F | 76.5 °F | 4.37 in. |
| July | 60.5 °F | 80.9 °F | 3.52 in. |
| August | 57.8 °F | 78.5 °F | 3.33 in. |
| September | 49.2 °F | 71.7 °F | 3.2 in. |
| October | 35.6 °F | 57.3 °F | 2.17 in. |
| November | 22.4 °F | 40.8 °F | 1.14 in. |
| December | 10.9 °F | 26.9 °F | 0.93 in. |
| Annual | 33.7 °F | 53.3 °F | 28.24 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |