BBC Weather Centre - Country Guides: Germany - Provides climate and weather information, facts and statistics about the country, along with five-day forecasts for major cities.
DWD - Deutscher Wetterdienst. German federal meterological service. Information about services, weather and climate, the service itself and its infrastructure.
NOAA NWS - Germany Weather - US government site provides hour-by-hour weather conditions for the past 24 hours for major cities and locations in the country.
Weather Underground - Germany - Displays current conditions for all major cities on one page, with five-day forecast and more detailed information for each available.