As of 7:44 PM MDT on June 29, 2026, all 7 cities in Valley County, MT in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Glasgow, MT with a reading of 0.6.
Over the next 24 hours, the highest UV Index reading in Valley County, MT is expected to be 5.5 in St. Marie between 2:00 PM - 3:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |