As of 3:03 PM CDT on August 8, 2025, out of 37 cities in Harris County, TX in our database, 31 cities (84%) have a UV Index reading of Very High, while 6 cities (16%) have a UV Index reading of High. The city with the highest UV Index reading right now is Katy, TX with a reading of 8.2.
Over the next 24 hours, the highest UV Index reading in Harris County, TX is expected to be 10.2 in Houston between 1:00 PM - 2:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |