Pack or skip
Beanie for Hilo in March
Verdict
Skip it
Lows near 61°F — no scenario where you'll want one.
Why
Hilo in March averages highs of 79°F, lows of 61°F, 19 rainy days.
That climate means a beanie isn't pulling its weight. Lows near 61°F — no scenario where you'll want one.