Pack or skip
Packable down jacket for Michigan City in December
Verdict
Pack it
Lows around 25°F — the packable puffer covers 90% of layering needs.
Why
Michigan City in December averages highs of 37°F, lows of 25°F, 9 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 25°F — the packable puffer covers 90% of layering needs.