UV Index Today in Hawaii (HI)
Friday, May 22, 2026 -8:37 AMGMT-10 (GMT-10)
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The average maximum UV Index today across 140 locations in Hawaii (HI), is 10.6. The highest projected maximum is 13.1 in Honaunau-Napoopoo at 12:00 PM GMT-10, while the lowest projected maximum is 7.4 in Mountain View at 1:00 PM GMT-10.
Tomorrow, the average maximum UV Index across those same locations is expected to be 8.9. The highest projected maximum is 12.2 in Pahala at 1:00 PM GMT-10, and the lowest projected maximum is 5.7 in Kilauea at 10:00 AM GMT-10.
4 Counties in Hawaii (HI)
Average Maximum UV Index Today
140 Places in Hawaii (HI)
Maximum UV Index Today