UV Index Today in Wisconsin (WI)

Saturday, August 29, 2026 -11:46 AM CDT (GMT-5)

The average maximum UV Index today across 1,516 locations in Wisconsin (WI), is 3.6. The highest projected maximum is 6.7 in River Falls at 1:00 PM CDT, while the lowest projected maximum is 1 in Worcester at 12:00 PM CDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 6.6. The highest projected maximum is 7.6 in Lake Geneva at 1:00 PM CDT, and the lowest projected maximum is 4 in St. Germain at 3:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

72 Counties in Wisconsin (WI)

Average Maximum UV Index Today
  • Brown County - 4.7
  • Dane County - 3
  • Milwaukee County - 5.6
  • Waukesha County - 5
Data Source: National Oceanic and Atmospheric Administration (NOAA)

538 Places in Wisconsin (WI)

Maximum UV Index Today
  • Madison - 2.6
  • Milwaukee - 5.6
Data Source: National Oceanic and Atmospheric Administration (NOAA)