Download the UV Index Today app - Get daily UV alerts

UV Index for Mercer, WI

Current Mercer UV Index

0 (Low)

Last Updated 41 seconds ago

Download the UV Index Today app - Get daily UV alerts

Hourly Mercer UV Index

The hourly Mercer, WI UV Index forecast for Saturday, October 10th, 2026.

5 Day Hourly Mercer UV Index Forecast

Last Updated 1 day ago