As of 11:09 AM HST on October 8, 2025, all 52 cities in Hawaii County, HI in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Honaunau-Napoopoo, HI with a reading of 10.
Over the next 24 hours, the highest UV Index reading in Hawaii County, HI is expected to be 11.1 in Honaunau-Napoopoo between 12:00 PM - 1:00 PM HST today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |