If the forecast is looking grim, why not head to Fricktaler Museum? You'll be surprised just how many interesting facts you can uncover about days gone by here.
Fricktaler Museum has an entrance fee and is a popular attraction in Rheinfelden. You'll find lots of other options nearby, so why not stick around a while longer? Sole Uno, Aquabasilea and Augusta Raurica are also favorites among many travelers.