Climate and Clothing
Munich has four seasons, each is quite different from the others.
Winter in Munich starts in the beginning of December where it is also likely to have the first snow. By the end of January it gets very cold, the temperature can fall down to -15 °C. Half of the winter you have snow, the other half is just cold or if the temperatuer is above 0°C it is cold and wet. Most of the days the sky is grey, though there are always a couple of days where you have sunshine and blue sky.
As you can see from the climate description, there is no time where you can be sure that it is not too cold or too hot if you bring only one type of clothes. You need something warm even for the summer, because nights can be around 15°C. You need properly insulated boots for the winter, with normal shoes you get wet feet very easily. A good rain protection(umbrella or a rain coat e.g.) is recommended, you can never be sure that you don't need it.
All statements without engagement.