As of 6:54 PM CDT on April 28, 2026, all 6 cities in Harrison County, TX in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Hallsville, TX with a reading of 1.1.
Over the next 24 hours, the highest UV Index reading in Harrison County, TX is expected to be 1.7 in Marshall 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 |