As of 1:34 PM MDT on April 1, 2025, out of 10 cities in Jefferson County, MT in our database, 9 cities (90%) have a UV Index reading of Moderate, while 1 city (10%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Whitehall, MT with a reading of 3.2.
Over the next 24 hours, the highest UV Index reading in Jefferson County, MT is expected to be 3.4 in Whitehall between 3:00 PM - 4:00 PM MDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |