It would be intuitive to open the additional layer menu by double clicking on an item in the menu on the right instead of the arrow button (using PC).

I like the forecasted values in cities because most people experience the weather there, but they don't differ from the surrounding land. This is caused by the design of the weather forecasting model. For example today the observed temperatures in the London city centre are today 2 degrees higher compared to nearby rural areas, while the forecast doesn't show any difference. This effect is even more pronounced in summer.