Grant County, WI: Current UV Index and Hourly Forecast

As of 5:05 PM CST on February 20, 2026, all 22 cities in Grant County, WI 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 Grant County, WI is expected to be 2.2 in Cassville between 12:00 PM - 1:00 PM CST tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Grant County, WI as of 5:05 PM CST, February 20, 2026

Current UV Index in Cities in Grant County, WI

5:05 PM CST, February 20, 2026