Heidelberg is one of the warmest cities in Germany. The weather is often sunny and mild. An hourly forecast is perfect for knowing when the light is best for photos of the castle or when is the best time to climb the Philosophers' Way.
Mornings are mild and the sun appears early. Ideal for a walk across the Old Bridge before the tourist crowds arrive. The hourly forecast shows how quickly the temperatures will climb.
The summer afternoons can get hot. The alleys of the old town offer cool shade. A short but heavy thunderstorm is possible. The hourly forecast helps to stay dry.
The evenings on the Neckar stay warm for a long time. Perfect for sitting in one of the many restaurants with a view of the river. A light jacket is often not needed until late at night.