Download the UV Index Today app - Get daily UV alerts

UV Index for Lanark, IL

Current Lanark UV Index

0 (Low)

Last Updated 57 minutes ago

Download the UV Index Today app - Get daily UV alerts

Hourly Lanark UV Index

The hourly Lanark, IL UV Index forecast for Saturday, July 18th, 2026.

5 Day Hourly Lanark UV Index Forecast

Last Updated 1 day ago