Download the UV Index Today app - Get daily UV alerts

UV Index for Lanark, WI

Current Lanark UV Index

0 (Low)

Last Updated 25 minutes ago

Download the UV Index Today app - Get daily UV alerts

Hourly Lanark UV Index

The hourly Lanark, WI UV Index forecast for Tuesday, May 5th, 2026.

5 Day Hourly Lanark UV Index Forecast

Last Updated 1 day ago