Why there is no simple way to create in the GUI Min / Max temp sensor for the current day / week / month or year. Ideally, this would record a timestamp.
Current implementation is really impractical. For example, as a gardener, I need to know the recorded min / max temperature for the current day (midnight to midnight) from my outdoor weather station. I am not interested in statistics on a rolling basis last 24 hours for example because this gives weird information, i.e. extremes might be from the day before but still within last 24 hours.
Another issue is Min / Max sensor requires min 2 sensors - ???. Everyone that follows weather forecasts knows that these extremes should be for a set period of time (day, week, month etc.)
Right now, the easiest way for me is to use Node Red and create a flow that stores the value and resets it accordingly to set time because there is an easy way to set it up in HA.