As of 3:52 PM MST on March 3, 2026, all 495 cities in Montana in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is West Yellowstone, MT with a reading of 2.3.
Over the next 24 hours, the highest UV Index reading in Montana is expected to be 3.8 in West Yellowstone between 12:00 PM - 1:00 PM MST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |