If you are planning a journey to East Switzerland and wish to enquire about weather conditions, then the weather app on meteo.srf.ch is a reliable source of information. The weather app will provide you with detailed infomation on the weather conditions in East Switzerland.
29. Aug18° / 22° Sunny intervals with repeated showers of rain.
30. Aug14° / 21° Sunny intervals.
31. Aug14° / 23° In the morning sunny. Later on sunny periods.