Sierra County, CA: Current UV Index and Hourly Forecast

As of 2:10 PM PDT on September 11, 2025, out of 11 cities in Sierra County, CA in our database, 7 cities (64%) have a UV Index reading of Low, while 4 cities (36%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Loyalton, CA with a reading of 5.

Over the next 24 hours, the highest UV Index reading in Sierra County, CA is expected to be 6.5 in Loyalton between 1:00 PM - 2:00 PM PDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Sierra County, CA as of 2:10 PM PDT, September 11, 2025

Current UV Index in Cities in Sierra County, CA

2:10 PM PDT, September 11, 2025