Yellowstone County, MT: Current UV Index and Hourly Forecast

As of 1:52 PM MDT on August 31, 2025, all 13 cities in Yellowstone County, MT in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Nibbe, MT with a reading of 6.9.

Over the next 24 hours, the highest UV Index reading in Yellowstone County, MT is expected to be 6.9 in Nibbe between 1:00 PM - 2:00 PM MDT today.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Yellowstone County, MT as of 1:52 PM MDT, August 31, 2025

Current UV Index in Cities in Yellowstone County, MT

1:52 PM MDT, August 31, 2025