Mankato, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.6 °C (low) to 18.1 °C (high). Annual precipitation averages 701.8 Millimeters. Mankato is located in USDA Plant Hardiness Zone 6a. 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 | -9.2 °C | 3.2 °C | 17.02 mm |
| February | -7.1 °C | 5.8 °C | 20.07 mm |
| March | -2.2 °C | 12.1 °C | 37.59 mm |
| April | 3.7 °C | 17.8 °C | 66.8 mm |
| May | 9.9 °C | 23.3 °C | 107.7 mm |
| June | 16.2 °C | 29.3 °C | 93.22 mm |
| July | 18.7 °C | 32.2 °C | 108.71 mm |
| August | 17.4 °C | 30.7 °C | 87.38 mm |
| September | 11.9 °C | 26.7 °C | 58.93 mm |
| October | 5.1 °C | 19.7 °C | 47.24 mm |
| November | -1.9 °C | 11.5 °C | 32.77 mm |
| December | -7.2 °C | 4.7 °C | 24.38 mm |
| Annual | 4.6 °C | 18.1 °C | 701.81 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |