Henning, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.1 °F (low) to 50.8 °F (high). Annual precipitation averages 26 Inches. Henning is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.6 °F | 17.9 °F | 0.65 in. |
| February | 2.6 °F | 23.1 °F | 0.63 in. |
| March | 16.2 °F | 35.9 °F | 1.16 in. |
| April | 30.2 °F | 51.8 °F | 2.09 in. |
| May | 43.5 °F | 65.2 °F | 3.38 in. |
| June | 54.4 °F | 74.4 °F | 4.25 in. |
| July | 59.0 °F | 79.0 °F | 3.94 in. |
| August | 56.2 °F | 77.4 °F | 2.99 in. |
| September | 48.0 °F | 69.4 °F | 2.69 in. |
| October | 35.0 °F | 54.2 °F | 2.54 in. |
| November | 21.1 °F | 37.2 °F | 0.9 in. |
| December | 7.6 °F | 23.6 °F | 0.79 in. |
| Annual | 31.1 °F | 50.8 °F | 26.01 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |