As of 9:35 AM MDT on March 19, 2026, all 4 cities in McCone County, MT in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Circle, MT with a reading of 0.9.
Over the next 24 hours, the highest UV Index reading in McCone County, MT is expected to be 4.7 in Brockway between 1:00 PM - 2:00 PM MDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |