Book collectors rely on hygrometers to alert them if humidity levels are soaring dangerously in the library. Outdoors, a three-in-one weather station that also measures temperature and atmospheric pressure can warn you if a storm or a cold snap is approaching. Your plants will thank you.
Above: A Stainless Steel Outdoor Weather Station is 132€ from Manufactum.
Above: Manufactured near Dresden by Fischer Precision Instruments, the instruments are sturdy and have been finely tuned. A mineral glass cover protects oversized faces you can read from a distance. For more, see "5 Favorites: Outdoor Thermometers With Style."