As Germany's sunniest city, Freiburg is known for its warm climate. Nevertheless, an hourly forecast is useful to avoid the intense midday sun or to be prepared for the "Höllentäler" wind from the Black Forest.
Mornings are mild and warm up quickly. Perfect for an early visit to the market at the cathedral. The hourly forecast shows how quickly the UV radiation increases.
The afternoons are hot and sunny. The best time to cool your feet in the cool "Bächle" (small water channels). Keep an eye on the hourly forecast, as short but heavy thunderstorms can develop from the Black Forest.
The evenings stay very warm for a long time. Ideal for spending the evening in one of the many outdoor cafés in the old town. The temperatures drop only slowly, which makes for balmy nights.