What to Wear in Hilo in August
Hilo in August sits firmly in its warm, humid wet season, with daytime temperatures typically ranging from the mid-70s to low 80s°F (24–28°C). Nights are mild, rarely dropping below 70°F (21°C), so heavy layers are unnecessary. What sets Hilo apart from other Hawaiian destinations is its rainfall — the city averages over 10 inches of rain in August alone, making it one of the wettest cities in the United States. Expect frequent showers, often short and intense, that can arrive at any time of day. Humidity consistently hovers above 80%, which means even light fabrics can feel sticky. Your best outfit strategy is to dress in moisture-wicking, quick-dry clothing — linen blends, lightweight cotton, or technical travel fabrics work well. A compact, packable rain jacket or a quality travel umbrella is non-negotiable. Opt for water-resistant sandals or shoes that dry quickly, as wet footwear is a constant reality. Avoid denim and heavy cotton, which become uncomfortable when damp and take forever to dry. If you're visiting Hawaii Volcanoes National Park, which sits at higher elevations, bring a fleece or light layer — temperatures there can be noticeably cooler and rainier than in town.
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Frequently Asked Questions
What to wear in Hilo in August?+
Stick to lightweight, quick-dry fabrics like moisture-wicking synthetics or linen blends, as Hilo is hot, humid, and extremely rainy in August. Pack a packable rain jacket or travel umbrella for daily showers, and choose water-resistant sandals or sneakers that dry fast. If you plan to visit Hawaii Volcanoes National Park, bring a light fleece layer for the cooler, wetter summit elevations.
Is Hilo cold in August?+
No, Hilo is not cold in August — daytime highs sit in the low 80s°F (around 27–28°C) and overnight lows rarely dip below 70°F (21°C). The main challenge is not cold but rather persistent humidity and rain. A light layer is only needed if you're heading up to higher elevations like Hawaii Volcanoes National Park, where temperatures can drop into the 50s°F.
Does it rain in Hilo in August?+
Yes, significantly — Hilo is one of the rainiest cities in the United States, and August sees an average of over 10 inches of rainfall. Showers are frequent, often short and intense, and can happen at any point during the day. Planning around rain is difficult, so it's better to simply dress for it with quick-dry clothes and a reliable rain jacket.
What should I pack for Hilo in August?+
Pack quick-dry shorts, breathable tops, at least one packable rain jacket, a travel umbrella, and water-resistant footwear. Avoid packing denim or heavy cotton, as these take too long to dry in Hilo's humidity. Bring a light fleece or long-sleeve layer if you're visiting Hawaii Volcanoes National Park, and don't forget reef-safe sunscreen for any beach or outdoor activities between rain showers.