The min / max of the thermometer on the index page is not erased every night?
“It is not an error but a feature”
The min max of the thermometer reflects the temperature of today and yesterday. So you will not receive in the morning a maximum which is equal to the current temperature of that time.
Now you always see a “reasonably probable” min max value for that day.
The expected (Yahoo WU) min / max temperatures, do not work because eachindividual stations temperature will vary for som degrees due to its location.