The ClimaCell Forecast Hourly .NET Sample Code demonstrates how to integrate hourly weather data including precipitation, how the weather feels like, humidity, atmospheric pressure, wind direction, visibility, sunrise, and sunset.
There are a number of ways to discuss API popularity. Our metrics are based on developer engagement. The "track" functionality on ProgrammableWeb lets developers declare an interest in receiving updates on particular APIs. Which APIs and categories are seeing the most activity.
Though Google Maps may still be the choice of most developers, Bing continues to be a contender. Microsoft evangelist Chris Pendleton points out a new Weather.com feature and mentions it has used the service since back when it was called Virtual Earth (the switch only happened this June).