Cimino 16cm Outdoor Weather Station

The advert says that this is designed for wall mounting indoors our outdoors and it has a robust and durable, weather resistant build. We bought it to use outside so we can get outside temperature in particular and have had it for two weeks. Last week in the rain it filled with2-3mm of water at the bottom inside the glass and steam on the inside which has rendered it unviewable. It obviously leaks. Really unhappy with this purchase.