As of 4:41 PM CDT on October 29, 2025, out of 13 cities in Jefferson County, TX in our database, 11 cities (85%) have a UV Index reading of Low, while 2 cities (15%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Hamshire, TX with a reading of 2.5.
Over the next 24 hours, the highest UV Index reading in Jefferson County, TX is expected to be 5.5 in Port Arthur 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 |