Michigan City, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.8 °C (low) to 14.7 °C (high). Annual precipitation averages 977.7 Millimeters. Michigan City is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.4 °C | 0.2 °C | 63.25 mm |
| February | -6.1 °C | 2.1 °C | 50.8 mm |
| March | -1.4 °C | 7.7 °C | 58.93 mm |
| April | 4 °C | 14 °C | 87.63 mm |
| May | 9.7 °C | 20.1 °C | 90.68 mm |
| June | 15.4 °C | 25.1 °C | 108.2 mm |
| July | 18.6 °C | 27.4 °C | 102.62 mm |
| August | 17.9 °C | 26.6 °C | 105.92 mm |
| September | 14.1 °C | 23.4 °C | 85.85 mm |
| October | 7.3 °C | 16.8 °C | 97.03 mm |
| November | 1.7 °C | 9.6 °C | 68.33 mm |
| December | -4.1 °C | 3.1 °C | 58.42 mm |
| Annual | 5.8 °C | 14.7 °C | 977.66 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |