Download the UV Index Today app - Get daily UV alerts

UV Index for Grafton, SD

Current Grafton UV Index

0 (Low)

Last Updated 1 minute ago

Download the UV Index Today app - Get daily UV alerts

Hourly Grafton UV Index

The hourly Grafton, SD UV Index forecast for Monday, April 20th, 2026.

5 Day Hourly Grafton UV Index Forecast

Last Updated 1 day ago