Lewis and Clark County, MT: Current UV Index and Hourly Forecast

As of 9:17 AM MDT on May 17, 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 Helena, MT with a reading of 1.7.

Over the next 24 hours, the highest UV Index reading in Lewis and Clark County, MT is expected to be 7.1 in Lincoln between 2:00 PM - 3:00 PM MDT today.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Lewis and Clark County, MT as of 9:17 AM MDT, May 17, 2025

Current UV Index in Cities in Lewis and Clark County, MT

9:17 AM MDT, May 17, 2025