I can second UAVirgin's recommendation of the Oregon WMR968. I imported one from the states a couple of years ago ($1=£1, don't you know ) and it has served me very well ever since. Certainly it's more than a basic thermometer with solar-powered, wireless anenometer, wind vane, barometer/thermometer/hygrometer and rain gauge. Coupled with the correct software (in my case Ambient's Virtual Weather Station and Meteorologica's WeatherFlash) it can produce very nice live results. Mine are at Centre for Water Systems Weather Station... as long as the computer that runs the weather station is still running

m.