When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Bangkok Intl is roughly less than Metz. You can assume this to be the case over the next 3 days.
Temperatures around the 36 °Cs can be experienced in April. The weather in Metz is colder than in Bangkok Intl. Plan for potential changes in flight availability as peak weather approaches in this location.