Pack or skip
Sunscreen for Michigan City in May
Verdict
Pack it
Sun still finds you at 68°F — UV doesn't care about temperature.
Why
Michigan City in May averages highs of 68°F, lows of 49°F, 9 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 68°F — UV doesn't care about temperature.