As of 12:14 PM MST on February 4, 2026, all 2 cities in Carter County, MT in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Alzada, MT with a reading of 1.7.
Over the next 24 hours, the highest UV Index reading in Carter County, MT is expected to be 2 in Alzada between 11:00 AM - 12:00 PM MST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |