Mitchell, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.6 °C (low) to 18.4 °C (high). Annual precipitation averages 1267 Millimeters. Mitchell is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 4.2 °C | 92.46 mm |
| February | -4.1 °C | 6.9 °C | 79.25 mm |
| March | 0.4 °C | 12.4 °C | 108.97 mm |
| April | 5.9 °C | 19.1 °C | 136.14 mm |
| May | 11.7 °C | 23.9 °C | 143.26 mm |
| June | 16.4 °C | 28.3 °C | 133.35 mm |
| July | 18.3 °C | 30.1 °C | 109.73 mm |
| August | 17.4 °C | 29.7 °C | 85.85 mm |
| September | 13.2 °C | 26.6 °C | 91.19 mm |
| October | 6.8 °C | 20.1 °C | 89.92 mm |
| November | 1.3 °C | 12.7 °C | 100.84 mm |
| December | -2.9 °C | 6.5 °C | 96.01 mm |
| Annual | 6.6 °C | 18.4 °C | 1266.97 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |