This Wiki contains a video explaining various features of the Weather Manager, including how to specify your buildings location, how to view that location's weather characteristics, and how you can import other weather data file types.
For additional step-by-step guidance on importing custom weather data, please see the following Wiki:
Importing custom Weather Data files - OpenBuildings | AECOsim | Speedikon Wiki - OpenBuildings | AECOsim | Speedikon - Bentley Communities