As of 4:57 PM MST on February 23, 2025, all 18 cities in Lewis and Clark County, MT in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Gilman, MT with a reading of 0.8.
Over the next 24 hours, the highest UV Index reading in Lewis and Clark County, MT is expected to be 3.3 in Helena Valley West Central 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 |