Sierra County, CA: Current UV Index and Hourly Forecast

As of 2:22 PM PDT on June 4, 2025, all 11 cities in Sierra County, CA in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Sierraville, CA with a reading of 9.

Over the next 24 hours, the highest UV Index reading in Sierra County, CA is expected to be 9.4 in Calpine 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 2:22 PM PDT, June 4, 2025

Current UV Index in Cities in Sierra County, CA

2:22 PM PDT, June 4, 2025