If you use the service sensibly you should provide yourself with an accurate forecast for your area. This weather monitoring outfit is based at Bablake School near Coventry and actually sends its data to the Met Office in London. World Forecasts CNN's weather service provides information and forecasts for towns and cities throughout the world.
Information given is basic and limited to high and low temperature as well a basic weather state.
The Met Office provides weather forecasts for the entire UK mainland and surrounding sea. The site provides the free 30 word 24 hour forecast and the shipping forecast. The Regional forecasts are split into 12 areas of the British Isles and are updated twice daily. The PA News Centre site is one of the best available free on the Internet. If you want to get really involved with weather forecasting and monitoring then you have to speak to the Royal Meteorological Society.