What to Wear in Hilo in December
Hilo in December sits in the heart of Hawaii's wet season, and this city earns its reputation as one of the rainiest in the United States. Expect temperatures ranging from around 62°F (17°C) at night to 78°F (26°C) during the day — warm but noticeably cooler than summer. Rainfall is frequent and often heavy, with December averaging over 12 inches of precipitation. Showers can arrive suddenly and pass quickly, so layering and waterproofing are non-negotiable. Your base outfit should be lightweight and breathable — linen or moisture-wicking fabrics work well given the humidity. Always carry a compact waterproof rain jacket or a packable poncho; an umbrella alone won't cut it when wind-driven rain hits. Footwear is critical: sandals are fine for dry stretches, but waterproof walking shoes or quick-dry sneakers will serve you far better if you're exploring Volcanoes National Park or the waterfall trails around town. Evenings can feel surprisingly cool, especially at elevation, so pack a light fleece or long-sleeve layer. Skip heavy denim — it stays wet for hours. Opt for quick-dry shorts, breathable t-shirts, and a versatile mid-layer you can tie around your waist between showers.
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Frequently Asked Questions
What to wear in Hilo in December?+
Wear lightweight, quick-dry clothing like moisture-wicking t-shirts and shorts or breathable pants. Always bring a waterproof rain jacket since showers are frequent and often heavy. Pack a light fleece or long-sleeve layer for cooler evenings, especially if you plan to visit higher elevations like Volcanoes National Park.
Is Hilo cold in December?+
Hilo is not cold in December by most standards, with daytime highs around 78°F (26°C) and nighttime lows near 62°F (17°C). However, the combination of rain and humidity can make it feel cooler than expected, and elevations above 4,000 feet — like near the volcano — can drop significantly, sometimes into the 40s°F.
Does it rain in Hilo in December?+
Yes, significantly. December is one of Hilo's wettest months, with average rainfall exceeding 12 inches. Rain tends to come in bursts rather than all-day drizzle, but it can be intense. A waterproof jacket and quick-dry clothing are essential, not optional, for any December visit.
What should I pack for Hilo in December?+
Pack quick-dry shorts and t-shirts, a packable waterproof rain jacket, a light fleece for evenings and higher elevations, and waterproof or quick-dry footwear. Skip heavy fabrics like denim or cotton hoodies — they absorb moisture and take too long to dry. A compact umbrella and a dry bag for your electronics are also smart additions.