I took forecasts for Bern and Zürich at the end of the day (~10PM), so that the forecast for the current day is not anymore "a forecast", and then also predictions of temperature and precipitation for up to 7 days.

A few weeks ago, I put a web app on top of it for easier navigation. You can check the history of forecast errors in these two/three (min/max temperature, precipitation) for Bern and Zürich in Switzerland. I may start recording other cities too.

I thought someone else may find this interesting. Any feedback, flaw, etc is more than welcome.

Best