With the type of summer we've had in the UK, having access to an accurate weather forecasting app is pretty much a prerequisite. The weather app built into the iPhone OS is pretty useless, which is why there are so many other options available in the App Store.
Weatherbug was one of the first to arrive on the scene and its maturity shows. It opens on the Conditions page, which shows the current temperature and wind speed along with a summary of other information like the Wind Chill factor and Humidity levels. You can then access a more detailed forecast by tapping on the Forecast tab, or view weather maps and weather videos.
With the unpredictable weather we get in the UK, a reliable forecasting app is a must, and Weatherbug is one of the best options out here.