San Joaquin County, CA: Current UV Index and Hourly Forecast

As of 3:38 PM PDT on September 15, 2025, out of 28 cities in San Joaquin County, CA in our database, 25 cities (89%) have a UV Index reading of High, while 3 cities (11%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Tracy, CA with a reading of 5.6.

Over the next 24 hours, the highest UV Index reading in San Joaquin County, CA is expected to be 7.3 in Manteca between 1:00 PM - 2:00 PM PDT tomorrow.

Search Cities in San Joaquin County, CA

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in San Joaquin County, CA as of 3:38 PM PDT, September 15, 2025

Current UV Index in Cities in San Joaquin County, CA

3:38 PM PDT, September 15, 2025