Weather station .....any ideas

I have looked for this myself, and so far, the only ones I have found will only take two sensors. Also, the extra sensors cost as much as or more than the unit. I am sure you might find something on the commercial market. I use a "Weather Station" with an outside sensor that does time, temperature, air pressure and humidity and has min-max memory. I use another small unit with a sensor in the freezer, and shows room temps that I place next to our thermostat. Just a small plastic unit in the fridg. I do have a unit that years old, came from Radio Shack, and reads 3 sensors. I bought the extra two sensors for it, and have used it for many long years, but it will only read two now.