In certain areas of Switzerland, winter months can bring prolonged periods without sunshine due to geographical factors. Villages like Vicosoprano and Bosco Gurin experience weeks without sun, as do some urban regions like Glis and Hergiswil. Notably, Emmetten faces a nearly three and a half month stretch without sunlight, while the aptly named ‘Schattenloch’ in Nesslau sees sun disappear as early as mid-October. These conditions highlight the unique solar challenges faced by both remote alpine communities and populated areas during the winter.