Colusa County, CA: Current UV Index and Hourly Forecast

As of 7:47 PM PDT on September 18, 2025, all 9 cities in Colusa County, CA in our database have a UV Index reading of 0, indicating no radiation from the sun.

Over the next 24 hours, the highest UV Index reading in Colusa County, CA is expected to be 5.5 in Princeton 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 Colusa County, CA as of 7:47 PM PDT, September 18, 2025

Current UV Index in Cities in Colusa County, CA

7:47 PM PDT, September 18, 2025