WMR100 Professional Weather Station with an FREE extra THGR810 sensor. This will save you £29.99 and allow you to measure the temperature and humidity in a second outdoor location. 

Ideal for any amateur meteorologist

It features a fully functional weather forecaster that measures not only temperature and barometric pressure but also wind speed/direction, wind chill, humidity, rainfall and dew point temperature. It can then plot a bar graph showing the current and historical data for barometric pressure and rainfall for up to a period of 24 hrs. The weather station can then be connected to your PC via a USB connection and the latest weather data can be collected from the base station. The unit itself also features a radio controlled clock with alarm. It can also be set up to alert you to certain weather conditions when a certain criteria is met.