Our clock hanging in the bathroom, which has from time to very high humidity and temperatures (27 degrees). We have the clock for 6 months in use (through the winter - therefore no higher, natural temperatures), but the clock still works properly. So far we have not yet changed the batteries.
5 stars because - A great look: looks great noble and clearly - Accuracy: clock, thermometer, date display - so far everything is working perfectly - Shipping & Packing: everything ran flawlessly