When flying from Hanoi to Bremen, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Expected rainfall in Hanoi is less than in Bremen. You can expect this to be the case over the next 19 days.
Temperatures around the 34 °C's can be experienced in June. The weather in Bremen is colder than in Hanoi. Plan for potential changes in flight availability as peak weather approaches in this location.