What's the temperature in Germany these days? Long sleeves, coat?

I don't know exactly where you are going.

It will get cold next week. Generally, it will be around 20 degrees. It seems that it will rise again at the end of the month, but it will not exceed 30 degrees.

The south is a little colder than the north. It is cold in the morning and evening, so you need to wear long sleeves. It's quite hot at noon, so you need to wear short sleeves.

Take an umbrella or a rainproof coat. Showers will often appear.

Other information, www.wetter.com.