Under influence of monsoon, and further because of the complicated topography, the climate in Vietnam always changes in one year, between the years, or between the areas from North to South and from low to high). The climate in Vietnam is also under disadvantage of weather, such as typhoons (advantage there are 6-10 storms and tropical low atmosphere in year), floods and droughts are threaten the life and the agriculture of Vietnam.)

The temperature in Vietnam is high. The annual average temperatures range from 22oC to 27oC. However, the average temperature is different in every place. In Hanoi the average temperature is 23oC, in Ho Chi Minh City 26oC and 25oC in Hue. Some places like Dalat and Sapa have a maximum temperature of 20oC in the summer.

Every year there are 100 rainy days and the average rainfall is 1,500 to 2,000mm. The humidity ranges around 80%. The sunny hours is 1,500 to 2,000 and the average solar radiation of 100 kcal/cm2 in a year.

The monsoon climate also influences to the changes of the tropical humidity. In general, in Vietnam there are two seasons, a hot and rainy season (from May to October), and a cold season (from November to April the next). However the four distinct seasons are most evident in the Northern provinces (from Hai Van Pass toward to the north): Spring, Summer, Autumn, and Winter.

HANOI

In Hanoi there are four distinct seasons: Spring, Summer, Autumn, and Winter. But it is possible to divide the climate here into two main seasons: the rainy season from May to September (it’s hot, heavy rain), and the dry season from October to April (it’s cold, little rainfall). The annual average temperature is 23.2oC, but in Winter the average temperature is 17.2oC. The lowest temperature ever recorded was 2.7oC in 1955. The average summer temperature is 29.2oC, with the highest ever recorded being 42.8oC in 1926. On average, there are 114 rainy days a year with around 1,800 mm of rainfall. 

HAI PHONG

It's one province in the North then Hai Phong is influenced by a tropical monsoon climate too. There are 4 seasons and the annual average temperature is between 23oC and 24oC. Rainfall total between 1,600 and 1,800 mm. The weather is warm throughout thee year. 

QUANG NINH

The climate is symbolic of the climate of North Vietnam; featuring all four seasons. In summer (from May to September), it's hot, humid and rainy, while monsoons flourish. In winter (from October to April), it's cold, dry, and sees little rainfall. The average temperature is over 25oC. Annual rainfall totals between 1,700 and 2,400 mm.  

HUE

It features a tropical monsoon climate, featuring all four distinct seasons: spring, summer, autumn and winter. The spring is cool and warm, the summer is hot, the autumn is cool and the winter is cold. Average temperature of 25oC. The best time for tourists is from November to April next year. 

DA NANG

Its climate is tropical, with two distinct rainy and dry seasons. The average annual temperature is between 28oC and 29oC, and storms hit the area every year in September and October.

LAM DONG (DA LAT)

The climate here is cold, with an average annual temperature of 180oC. Dalat is a city town, the climate is temperature and there are the  beautiful natural landscapes with the waterfalls, lakes and pine groves, and is well known as Vietnam’s flower city. 

HO CHI MINH

The climate is divided into two seasons, with the rainy season lasting from May to November. The average annual temperature is 27.5oC without winter, and yearly rainfall totals 1,979 mm. Tourism is convenient for all 12 months of the year. 

VUNG TAU

The climate here is tropical monsoon. The average annual temperature is 27.0oC, rarely stormy, rich in sunshine. Vung Tau is without winter so resorts can active throughout the year.