I have several temperature sensors and still didn’t find a convenient way to show their min and max of the current day.
I’m aware of the Statistics sensor, which provides min/max attributes, however only within a specific time period, not for the current day. So while I can see the min/max values of the last 24 hours, I can’t see the values for 00:00 until now. So if I look at the value in the morning it’s likely that the values are still from yesterday.
For me it would be enough to make the max_age property of the statistics sensor accept a time (e.g. 00:00), at which the values will be resetted.