Mitchell, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.1 °C (low) to 14.4 °C (high). Annual precipitation averages 634.8 Millimeters. Mitchell 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 | -13.4 °C | -2.7 °C | 14.48 mm |
| February | -11.2 °C | 0.3 °C | 20.07 mm |
| March | -5.2 °C | 6.8 °C | 31.24 mm |
| April | 1.4 °C | 14.4 °C | 76.71 mm |
| May | 8.4 °C | 21.1 °C | 88.9 mm |
| June | 14.7 °C | 26.7 °C | 96.01 mm |
| July | 17 °C | 29.8 °C | 74.42 mm |
| August | 15.7 °C | 28.6 °C | 72.9 mm |
| September | 10.5 °C | 24.5 °C | 66.04 mm |
| October | 2.8 °C | 16.3 °C | 51.82 mm |
| November | -4.7 °C | 7.3 °C | 22.86 mm |
| December | -10.7 °C | -0.3 °C | 19.3 mm |
| Annual | 2.1 °C | 14.4 °C | 634.75 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |