Pack or skip
Packable down jacket for Knoxville in December
Verdict
Pack it
Lows around 31°F — the packable puffer covers 90% of layering needs.
Why
Knoxville in December averages highs of 51°F, lows of 31°F, 10 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 31°F — the packable puffer covers 90% of layering needs.