Michigan City, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.5 °F (low) to 58.4 °F (high). Annual precipitation averages 38.5 Inches. 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 | 18.7 °F | 32.3 °F | 2.49 in. |
| February | 21.1 °F | 35.8 °F | 2.0 in. |
| March | 29.4 °F | 45.9 °F | 2.32 in. |
| April | 39.2 °F | 57.2 °F | 3.45 in. |
| May | 49.5 °F | 68.2 °F | 3.57 in. |
| June | 59.7 °F | 77.1 °F | 4.26 in. |
| July | 65.4 °F | 81.3 °F | 4.04 in. |
| August | 64.3 °F | 79.8 °F | 4.17 in. |
| September | 57.3 °F | 74.1 °F | 3.38 in. |
| October | 45.1 °F | 62.3 °F | 3.82 in. |
| November | 35.0 °F | 49.3 °F | 2.69 in. |
| December | 24.7 °F | 37.5 °F | 2.3 in. |
| Annual | 42.5 °F | 58.4 °F | 38.49 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |