Bascially, the average home is 20 degrees C, but this is too hot for wine, the ideal is 10-13 C or 50-55 degree Fahrenheit. YOu can have it as high as 15C for emdium term storage but not above 18C. Main thing is to prevent temperatur fluctuation as noted by “thewinedoctor.com”:http://www.thewinedoctor.com/advisory/buystoreidealcellar.shtml with “intowine”:http://www.intowine.com/cellar.html#basic saying much the same that 10-12C (50-55F) is optimnum, but any constant temperature withint 4-18C (40-65F will do). A wine kept at 68F will age twice as fast as those at 50F and at 55F (12C), it will age slowly and with better complexity.
Humidty-wise, relative humidity of 50-80% is acceptable, but 70% is recommended and of course it should be dark.