The weather is rather humid in the mountainous regions of Vietnam, hence the very green landscape of rice fields and flora. Don't forget to take rain gear for the occasional shower. The temperatures are pleasant and alternate between 20 and 25°C during the day. In mountainous areas, temperatures can be a little cooler, especially at night when they can drop to around 15°C. So remember to take a sweater or fleece for the evenings.
Consult general information sites and the list in your Detailed Travel Program to find out what type of equipment and clothing to pack for your trip.