Gallatin County, MT: Current UV Index and Hourly Forecast

As of 9:27 AM MDT on August 9, 2025, all 18 cities in Gallatin County, MT in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Big Sky, MT with a reading of 1.9.

Over the next 24 hours, the highest UV Index reading in Gallatin County, MT is expected to be 8.7 in Big Sky between 1:00 PM - 2:00 PM MDT today.

Search Cities in Gallatin County, MT

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Gallatin County, MT as of 9:27 AM MDT, August 9, 2025

Current UV Index in Cities in Gallatin County, MT

9:27 AM MDT, August 9, 2025