Pack or skip
Packable down jacket for Las Vegas in January
Verdict
Pack it
Lows around 38°F — the packable puffer covers 90% of layering needs.
Why
Las Vegas in January averages highs of 58°F, lows of 38°F, 4 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 38°F — the packable puffer covers 90% of layering needs.