Is it going to rain a lot? A light jacket should be enough in the morning and evening, right ?

It's okay, even if it rains, it's only for a short time.

Very little rain, East Europe 38 days only meet once or twice and very short time

For three days in Prague, it didn't rain the whole day, but it rained every day, the longest time was almost an hour, but the sky cleared up immediately after the rain