As of 3:18 PM MDT on July 27, 2026, out of 7 cities in Valley County, MT in our database, 5 cities (71%) have a UV Index reading of High, while 2 cities (29%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Nashua, MT with a reading of 6.2.
Over the next 24 hours, the highest UV Index reading in Valley County, MT is expected to be 7.3 in Fort Peck between 1:00 PM - 2:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |