Please make suggestions if you find new useful links.
Data Download: https://www.meteosuisse.admin.ch/services-et-publications/service/open-data.html
Measurement network SwissMetNet and more (map): https://www.meteoschweiz.admin.ch/service-und-publikationen/applikationen/messwerte-und-messnetze.html
Extreme precipitation- App: https://www.meteoschweiz.admin.ch/klima/klima-der-schweiz/rekorde-und-extreme/extremwertanalysen.html
Homogeneous series / homogene Messreihen: https://www.meteoschweiz.admin.ch/service-und-publikationen/applikationen/ext/climate-tables-homogenized.html#https%3A%2F%2Fservice.meteoswiss.ch%2Fproductbrowser%2FproductDisplay%2Fclimate-tables-homogenized%3Flang=de&cg1.location=ALT&cg1.productName=climate-reports-tables-homogenized
Temperatur - & Niederschlagsmittel: https://www.meteoschweiz.admin.ch/klima/grundlagen-fuer-die-klimaanalyse-daten-und-methoden/schweizer-temperatur-und-niederschlagsmittel.html
Monthly and annual gridded maps: https://www.meteoschweiz.admin.ch/klima/klima-der-schweiz/monats-und-jahresgitterkarten.html
Drought indicators: https://www.meteoschweiz.admin.ch/service-und-publikationen/applikationen/ext/climate-drought-series.html
Climate change data at stations, CH2025: https://www.meteoswiss.admin.ch/climate/climate-change/swiss-climate-scenarios/reports-data-and-graphs-of-climate-change-scenarios/climate-ch2025-datasets.html