When traveling, we recommend packing in preparation to handle common weather conditions. The rainfall in Hanoi is typically greater than that of Nuremberg. We can gather that this will continue over the next 19 days.
You can imagine temperatures to be in the 34 °C range in June. The weather in Nuremberg is generally colder than Hanoi's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.