As of 1:07 PM MDT on May 4, 2026, all 2 cities in Prairie County, MT in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Terry, MT with a reading of 3.2.
Over the next 24 hours, the highest UV Index reading in Prairie County, MT is expected to be 4.4 in Terry between 12:00 PM - 1:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |