Menno, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.5 °F (low) to 58.9 °F (high). Annual precipitation averages 25.2 Inches. Menno is located in USDA Plant Hardiness Zone 5a. 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 | 8.9 °F | 28.0 °F | 0.55 in. |
| February | 13.0 °F | 33.2 °F | 0.68 in. |
| March | 23.7 °F | 45.4 °F | 1.26 in. |
| April | 35.2 °F | 59.4 °F | 2.81 in. |
| May | 47.5 °F | 71.5 °F | 3.56 in. |
| June | 58.7 °F | 81.7 °F | 3.63 in. |
| July | 62.9 °F | 86.0 °F | 2.94 in. |
| August | 60.5 °F | 83.4 °F | 2.89 in. |
| September | 51.4 °F | 76.9 °F | 2.87 in. |
| October | 37.9 °F | 62.9 °F | 2.17 in. |
| November | 24.3 °F | 45.8 °F | 1.0 in. |
| December | 13.7 °F | 32.3 °F | 0.79 in. |
| Annual | 36.5 °F | 58.9 °F | 25.15 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |