The full dataset of the wiewarm.ch website containi 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. The date format is YYYY-MM-DD hh:mm:ss.

> Original Author Credit: The dataset was first published by Christian Ramseyer