If the weather forecast is grim, why not spend some time at Royal Palace Museum? You'll be fascinated by just how much you can learn about days gone by here.
You'll be spoiled for sightseeing choice when in Luang Prabang. Royal Palace Museum is a good place to begin here, but there are many other worthy sights to explore. Night Market, Morning Market, and Phousi Hill are close to the collection of historical artifacts and will fill in your day nicely.