Digital hygrometers allow you to know indoor & outdoor humidity all from the comfort of your home. Many offer time, temperature, high/low history and more.
Hygrometers measure humidity. Analog hygrometers give you an easy-to-read display and fast response time. They are highly accurate and can be calibrated.
Humidity is one of the two most basic of weather variables (the other being temperature) and all of us are interested in what they are right now and what they will be in the future. Hygrometers are able to measure the humidity or amount of moisture (water vapor) in the air. By knowing the percentage of humidity in the air along with the current temperature, dew point temperature and heat index can be calculated. These factors can be important to those who work and play outside. They are also important to farmers and other agricultural concerns with regard to stress in livestock or plants, or in properly irrigating crops. Combination thermometer hygrometers are also ideal for greenhouse operations.