As of 12:13 PM CDT on August 11, 2025, out of 12 cities in Williams County, ND in our database, 9 cities (75%) have a UV Index reading of Low, while 3 cities (25%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Alamo, ND with a reading of 4.4.
Over the next 24 hours, the highest UV Index reading in Williams County, ND is expected to be 7.2 in Williston between 2:00 PM - 3:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |