Mitchell, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.8 °F (low) to 57.9 °F (high). Annual precipitation averages 25 Inches. 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 | 7.9 °F | 27.2 °F | 0.57 in. |
| February | 11.9 °F | 32.6 °F | 0.79 in. |
| March | 22.6 °F | 44.3 °F | 1.23 in. |
| April | 34.5 °F | 57.9 °F | 3.02 in. |
| May | 47.2 °F | 69.9 °F | 3.5 in. |
| June | 58.4 °F | 80.1 °F | 3.78 in. |
| July | 62.6 °F | 85.6 °F | 2.93 in. |
| August | 60.2 °F | 83.5 °F | 2.87 in. |
| September | 50.9 °F | 76.1 °F | 2.6 in. |
| October | 37.0 °F | 61.3 °F | 2.04 in. |
| November | 23.6 °F | 45.1 °F | 0.9 in. |
| December | 12.7 °F | 31.4 °F | 0.76 in. |
| Annual | 35.8 °F | 57.9 °F | 24.99 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |