Track multiple weather conditions at your precise location instead of relying on weather data usually taken from your nearest airport. The AcuRite Iris (5-in-1) outdoor weather sensor boasts a rugged, weatherproof construction and an automatic, self-draining rain gauge. It features dual solar cells that power an internal fan to maximize ambient temperature accuracy at all hours of the day. For additional accuracy, the temperature, humidity, and barometric pressure measurements can be manually calibrated if sensor placement or environmental factors impact data accuracy.