Mariposa County, CA: Current UV Index and Hourly Forecast

As of 2:10 PM PDT on September 11, 2025, all 17 cities in Mariposa County, CA in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Lake Don Pedro, CA with a reading of 6.5.

Over the next 24 hours, the highest UV Index reading in Mariposa County, CA is expected to be 6.8 in Yosemite Valley between 12:00 PM - 1:00 PM PDT tomorrow.

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

Current UV Index in Cities in Mariposa County, CA

2:10 PM PDT, September 11, 2025