Menahga, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.3 °F (low) to 50.3 °F (high). Annual precipitation averages 27.1 Inches. Menahga is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.4 °F | 17.7 °F | 0.66 in. |
| February | 1.4 °F | 23.0 °F | 0.65 in. |
| March | 15.2 °F | 35.8 °F | 1.21 in. |
| April | 29.5 °F | 51.2 °F | 2.08 in. |
| May | 42.7 °F | 64.5 °F | 3.5 in. |
| June | 53.5 °F | 73.8 °F | 4.35 in. |
| July | 58.1 °F | 79.0 °F | 4.21 in. |
| August | 55.3 °F | 77.1 °F | 2.96 in. |
| September | 47.0 °F | 68.7 °F | 2.77 in. |
| October | 34.3 °F | 53.2 °F | 2.71 in. |
| November | 20.8 °F | 36.7 °F | 1.08 in. |
| December | 7.0 °F | 23.1 °F | 0.91 in. |
| Annual | 30.3 °F | 50.3 °F | 27.09 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |