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

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As of 8:42 AM MDT on August 10, 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 0.7.

Over the next 24 hours, the highest UV Index reading in Lewis and Clark County, MT is expected to be 8.8 in Rimini 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 - 0.6
• Canyon Creek - 0.7
• Craig - 0.7
• East Helena - 0.7
• Gilman - 0.7
• Helena - 0.7
• Helena Valley Northeast - 0.7
• Helena Valley Northwest - 0.7
• Helena Valley Southeast - 0.7
• Helena Valley West Central - 0.7
• Helena West Side - 0.7
• Lincoln - 0.6
• Marysville - 0.7
• Milford Colony - 0.7
• Rimini - 0.7
• Unionville - 0.7
• Wolf Creek - 0.7
• York - 0.7