What to Wear in Hilo in August
August in Hilo averages 82°F highs and 66°F lows with about 15 rainy days — the Big Island's wettest city is consistently warm and consistently rainy year-round. A lightweight waterproof layer is always worth carrying. Hawaii Volcanoes National Park's hardened lava terrain requires closed-toe shoes; Hilo's farmer's market and downtown are comfortable in breathable cotton and quick-dry fabrics.
August in Hilo is Hawaii's lush, wet tropical summer — 82°F with the consistent warmth and rainfall that makes the Big Island's eastern side the rainiest in the US, averaging 130+ inches per year. About 15 rainy days in August means showers can arrive on any given day, though they're often brief and followed by sunshine. The warm temperatures and frequent rain create the lush jungle landscape that defines Hilo's character. Hilo's Hawaiian casual aesthetic is practically adapted to its weather: aloha shirts in breathable cotton, quick-dry fabrics that handle brief showers and dry quickly, and closed-toe shoes for Hawaii Volcanoes National Park where hardened lava rock terrain destroys sandals within a walk. Hilo Farmers Market and downtown's flat walkable area are comfortable in any casual footwear during dry windows. Rainbow Falls and Akaka Falls jungle trail access benefits from quick-dry fabrics and shoes that handle wet, rooted trail surfaces. If combining Hilo with Mauna Kea summit visits, pack for 32°F at the summit — the temperature difference from Hilo's 82°F is dramatic and requires a complete gear change.
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Frequently Asked Questions
What should I wear in Hilo in August?+
Hilo in August averages 82°F with about 15 rainy days. Breathable cotton aloha-style clothing and quick-dry fabrics that handle brief showers are the most practical choices. A lightweight waterproof layer is always worth carrying. For Hawaii Volcanoes National Park, closed-toe shoes with grip are essential — hardened lava terrain destroys sandals immediately.
How much does it rain in Hilo in August?+
Hilo averages 15 rainy days in August, but rainfall is often brief tropical showers that pass quickly and are followed by sunshine. Hilo is the rainiest city in the US at 130+ inches annually — August is one of the wetter months. A lightweight rain jacket or waterproof shell is useful daily, though torrential all-day rain is less common than frequent light showers.
Is August a good time to visit Hilo?+
August is a consistently warm and beautiful time to visit Hilo. Hawaii Volcanoes National Park, Rainbow Falls, Akaka Falls, and the Hilo Farmers Market are all accessible and lovely. The frequent brief showers keep the landscape intensely green and lush. August is quieter than the peak winter season, with lower accommodation rates and smaller crowds at popular sites.
What shoes should I wear in Hilo in August?+
Closed-toe shoes with grip are essential for Hawaii Volcanoes National Park — the hardened lava rock terrain (aa lava) immediately shreds sandals and provides poor traction. For Hilo's downtown, Farmers Market, and flat urban areas, casual flat shoes or sandals work well on dry terrain. Rainbow Falls and Akaka Falls trails benefit from shoes with grip for wet, rooted surfaces.
What should I pack for Hilo in August?+
Pack breathable cotton and quick-dry fabrics for Hilo's warm, rainy August. A lightweight waterproof jacket is the most practical single addition. Closed-toe shoes for Volcanoes National Park, casual sandals or flat shoes for Hilo's flat urban areas, and SPF for the intense Hawaiian UV on sunny windows are the essentials. If combining with Mauna Kea summit visits, pack a warm jacket and gloves — the 13,796-ft summit is 50°F colder than Hilo.