Digital display of temperature, humidity, time, and room climate. Comfort index for humidity with display "too dry - optimum - too humid" for a healthy indoor climate. Weather forecast display with four symbols: sunny, slightly cloudy, cloudy, and rainy. Thermometer displays the indoor temperature and is switchable between degrees Celsius and Fahrenheit. Max/min data memory for temperature. Clock/calendar/alarm function with time switchable in 12/24 hour format, date and weekday display, alarm display, and snooze function. Hygrometer features a trend display for air humidity. Ideal for monitoring the indoor climate in bedrooms, children's rooms, living rooms, conservatories, and greenhouses.