St. Croix County, WI: Current UV Index and Hourly Forecast

As of 5:31 PM CDT on September 18, 2025, all 14 cities in St. Croix County, WI in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is New Richmond, WI with a reading of 1.3.

Over the next 24 hours, the highest UV Index reading in St. Croix County, WI is expected to be 3.9 in New Richmond between 12:00 PM - 1:00 PM CDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in St. Croix County, WI as of 5:31 PM CDT, September 18, 2025

Current UV Index in Cities in St. Croix County, WI

5:31 PM CDT, September 18, 2025