What to Wear in Hilo

Summer in Hilo (June through September) brings slightly warmer and more humid conditions, with daytime highs often reaching the low-to-mid 80s°F. Lightweight breathable fabrics like linen or moisture-wicking cotton are ideal, paired with a packable rain jacket since afternoon showers are frequent. Sandals or quick-dry shoes work well for most of the town, but bring closed-toe shoes if you plan to hike in the national park or along the coast.

Winters in Hilo are mild by most standards, with daytime temperatures in the high 70s°F and cooler evenings dipping into the low 60s°F. A light layer such as a long-sleeve shirt or thin fleece is useful for mornings and evenings, and rain gear remains essential as December through February can be especially wet. If you are visiting Hawaii Volcanoes National Park during your trip, pack a proper warm jacket since temperatures at the summit can fall below 40°F.

Hilo is not cold at sea level — year-round temperatures are warm and tropical, rarely dropping below 60°F even at night. However, the elevation around the Big Island changes things dramatically; nearby Mauna Kea and Mauna Loa can experience freezing temperatures and even snow in winter. Visitors sometimes underestimate how cool it gets after dark or at higher elevations, so a light layer is always worth having in your bag.

Hilo receives over 130 inches of rain per year on average, making it one of the rainiest cities in the country, though most showers are brief and do not last all day. Temperatures stay warm and stable throughout the year, generally between 65°F and 85°F, with trade winds providing a consistent breeze. Humidity is noticeable but rarely oppressive, and the combination of frequent rain and sunshine means rainbows are a common sight across the city.