Pack or skip
Packable down jacket for Hilo in September
Verdict
Skip it
Lows around 65°F — you'll never reach for it.
Why
Hilo in September averages highs of 82°F, lows of 65°F, 15 rainy days.
That climate means a packable down jacket isn't pulling its weight. Lows around 65°F — you'll never reach for it.