Baden Baden has an Oceanic climate which means that there are very mild changes in the high and low temperature. Rainfall is adequate and spread over the entire year. The weather can be classified in 2 divisions.
Winter: Winter lasts from November till almost March. Though there is not a huge variation in the temperature, but still one can feel the weather becoming cooler and cooler.
Summer: April to October are the summer months when the temperature is warmer than winters but still mild and very enjoyable.
There is no specific best time visit for Baden.Baden as the weather is almost excellent year around. Being a spa town, one can visit it either during the winters or the summers. There is no peak season or off season for the city.
We will be updating Best Time to Visit in Baden-baden soon.