If the forecast is looking grim, why not head to Nagiso-machi Museum? You'll be surprised just how much you can learn about days gone by here.
This collection of historical artifacts is located in Tsumago-juku, a place that has so much on offer! Tsumago Honjin, Waki-Honjin, and Nakasendo Road - Magome to Tsumago are other worthwhile attractions nearby when you've finished up at Nagiso-machi Museum.