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

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

• Augusta - 1.5
• Canyon Creek - 1.7
• Craig - 1.7
• East Helena - 1.7
• Gilman - 1.6
• Helena - 1.7
• Helena Valley Northeast - 1.6
• Helena Valley Northwest - 1.6
• Helena Valley Southeast - 1.7
• Helena Valley West Central - 1.6
• Helena West Side - 1.7
• Lincoln - 1.5
• Marysville - 1.7
• Milford Colony - 1.5
• Rimini - 1.7
• Unionville - 1.7
• Wolf Creek - 1.7
• York - 1.6