Vietnam is located in both a tropical and a temperate zone. It is characterized by strong monsoon influences, but has a considerable amount of sun, a high rate of rainfall, and high humidity. Regions located near the tropics and in the mountainous regions are endowed with a temperate climate.

The monsoon climate also affects the changes of the tropical humidity. In general, there are two seasons in Vietnam , the dry season occurs from November to April and the rainy season from May to October. The difference in temperature between the two seasons in the south is almost unnoticeable, averaging 3ºC. The most noticeable variations are found in the north where differences of 12ºC have been observed. There are essentially four distinct seasons, which are most evident in the Northern provinces (from Hai Van Pass toward the north): spring, summer, autumn and winter.

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

Vietnam is affected by the monsoon, that’s why the average temperature is lower than other countries which are located in the same longitude in Asia . The annual average temperatures range from 22oC to 27oC. As compared to these countries, the temperature in winter is colder and in summer is not as hot as in Vietnam .

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 threatening the human life and the agriculture sector of Vietnam ).

For travelers, it would make sense to check the local weather condition with your travel agents or logging on the internet prior to visiting Vietnam as you need to make sure what kind of clothing would be best to carry on your holiday.

The best time to visit Vietnam is from March to May and August to October as the whole country has decent sunshine with reasonable temperatures. Light clothing is preferable, yet bring an extra layer if you go to mountainous areas as it is cool at night. Be aware that October / November is peak typhoon time for the central areas - such as Hoi An. If you visit Hoi An at that time, do have a plan B ready as flooding from a typhoon weather system is always a possibility..