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Register lower max temperature and higher min temperature

Posted: Fri Jun 01, 2012 9:59 pm
by Wessel
How can I know the lower max temperature and higher min temperature for a period, such as, a month, year and all time? I did a webpage with the records of actual day, month, year and all time, and I would like to have these two informations too.
I tryed to search but I didn't find.