Be informed about the weather condition with this Walnut Barometer. Get to know whether it will be cloudy or dry so you can plan your day with confidence.A barometer is an instrument that measures atmospheric pressure. Changes in atmospheric pressure can affect the weather. Increasing pressure indicates that the weather will be getting better with more warmer and dryer conditions. Decreasing pressure indicates that the weather is set to worsen - with cloudy days and rainfall. Quick drops in pressure can signify that a storm is imminent in the next several hours.The Walnut Barometer has three dials - one for temperature, one for humidity, and one for the all-important barometric pressure. it is designed for indoor use and can be mounted on the wall.