Full dataset of the wiewarm.ch website, containing many millions of temperature points from pools, rivers and lakes all over Switzerland.
The data is collected on the website http://www.wiewarm.ch either by manual entry or from sensors. Entries go back to 2001 when the website launched.
The temperature values are in degree celsius, and the file encoding is UTF-8 with "Unix"-style line feeds. Date format is YYYY-MM-DD hh:mm:ss. The CSV of the current year will be updated daily.
You can freely use this data according to Creatvie Commons Attribution-ShareAlike 3.0. See the wiewarm.ch info page for instructions how to properly attribute the source.