As of 10:15 PM CDT on April 23, 2025, all 18 cities in Grayson County, TX in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in Grayson County, TX is expected to be 6.2 in Van Alstyne between 3:00 PM - 4:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |