How Crowded Is Hawaiʻi Volcanoes in May?
May is a quiet month at Hawaiʻi Volcanoes National Park, running about 0.8× the park's average month — roughly 7% of the year's visitors come in May. That puts it between the January peak and the September low. Overall our best-time score rates May as "Excellent" for a visit. Typical May weather averages a high near 82°F and a low around 68°F, with about 1.4" of precipitation. You'll get about 12.9 hours of daylight to explore.
Frequently Asked Questions
May is quiet at Hawaiʻi Volcanoes National Park (about 0.8× the average month). Our best-time score rates it "Excellent". The single best month overall is September.
The busiest month is January and the quietest is September. May sits at about 0.8× the park's average, or 7% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.