Vietnam has a varied climate because its territory extends over many latitudes (about 2500 km from north to south) and covers large differences in altitude. When a region is wet, cold or rainy, there is always another that is pleasantly sunny. North, Central and South Vietnam have very different climatic conditions.

Only the north knows a winter period where temperatures can drop to 10°C around Hanoi and even 5-6°C on the heights. Between December and March, the northeast monsoon mainly affects the northern part of the Cloud Pass. It brings cool, wet winters to all areas north of Da Nang and mild, dry weather to the south. From April to October, the southwest monsoon blows its moisture laden winds from the Indian Ocean and the Gulf of Thailand. It brings hot, humid weather all over the country, except in high mountain areas.