As of 1:56 PM MDT on September 12, 2026, all 10 cities in Ravalli County, MT in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Darby, MT with a reading of 5.4.
Over the next 24 hours, the highest UV Index reading in Ravalli County, MT is expected to be 5.5 in Darby between 2:00 PM - 3:00 PM MDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |