Although the Vietnamese territory is located in the tropics, the climate of Vietnam is divided into three distinct climatic zones according to the Köppen climate classification with the North and North Central regions as a humid subtropical climate.
The North consists of 4 seasons: Spring, Summer, Autumn, and Winter. Central and South Central regions are tropical monsoon climate, the South Central and Southern provinces with Xavan tropical characteristics. At the same time, due to being located on the southeastern edge of the continental Asian part, bordering the South China Sea (part of the Pacific Ocean), should be directly influenced by the trade wind, often blowing in low latitudes places. The South usually has two seasons: the rainy season and the dry season.
It is necessary to distinguish between temperate and tropical climates, temperate climates with four seasons, Spring, Summer, Autumn and Winter and tropical climates with only two seasons, sun and rain. In Vietnam, the North has four seasons, so it is entirely in temperate. Southern regions with two seasons, so it is entirely in the tropics.
Vietnam climate regions
Including the territory north of the Hoanh Son range. This region has a humid subtropical climate. However, this climate zone is characterized by instability due to the start time and end time of seasons and temperature.
- The Northeast region includes the Northern Delta and the mountainous areas on the left bank of the Red River. This area is characterized by a common topography of low hills and mountains below 1000 m. The arc-shaped mountain ranges in the northeast face up towards Tam Dao mountain range. (That is the arc, including Dong Trieu, Bac Son, Ngan Son, and Song Gam, which do not prevent but form the northeastern slopes and the Northwind often blows in the winter). The Gulf of Tonkin borders this area to the east, and the west is blocked by the highest Hoang Lien Son range in Vietnam (> 3001 m), so it is more affected by the humid monsoon climate than the Northwest. Therefore, the Northeast is directly affected by tropical storms, in summer, less affected by the Laos wind (foehn wind).
- The North West region of the North includes the mountains from the right bank of the Red River to the Hoanh Son range. The Hoang Lien Son high mountain range that stretches in a northwest-southeast direction like a wall make cold northeast monsoon winds is weakened, etc.
Including the territory of the Central Highlands and the South. This region has a tropical Xavan climate with two seasons: the dry season and rainy season (from the month: 4-5 to 10-11). Throughout the year, the temperature of this region is high. The temperature margin is significantly smaller than that of the North Bach Ma area. It has a very characteristic long dry season. The climate in this region is less volatile in the year compared to the Northern region.
In addition, there are two more climatic regions in Vietnam. That is the Truong Son climate zone and the East Sea climate zone. The East Sea of Vietnam is characterized by a tropical ocean and is relatively homogeneous. Here there are frequent swirls from the Pacific Ocean, forming big storms.
Spring in Vietnam
March and April in Vietnam are hot. Warm sea water brings no relief. In addition at the last days of April begins a season of tropical showers. Tourists flow gradually comes to naught. The temperature in central regions is about 25 °C (77 °F) and showers are gaining frequency and intensity.
May is very hot. The northern part is showery than in central regions. Swimming is available along the whole coast. The frequency of rains is an only concern while choosing the location for a vacation in May. Also, people with health issues should consider visiting Vietnam in May due to possible difficulties with bearing heat and high humidity.
Variable date at March – Day of Remembrance of Kings Hung.
April 30 – Day of liberating the South for national reunification.
May 1 – International Workers’ Day.
May 7 – Dien Bien Phu Victory Day.
May 19 – President Ho Chi Minh’s Birthday.
Summer in Vietnam
Summertime weather stresses the diversity of weather conditions of Vietnam. South of the country has an average summer daytime temperature about 35 °C. Frequent heavy showers are a common thing throughout the whole summer. But they don’t last longer than a couple of hours.
The central part of Vietnam is dryer. But in August it is literally flooded with rains and typhoons. Northern regions are bit hotter with even more precipitation. But heat is easier to bear because of ocean breezes. Dusk brings little relief dropping temperature to about 27 °C (81 °F). Also, there are tons of mosquitos so repellents are necessary.
June 1 – International Children’s Day.
June 28 – Vietnamese Family Day.
July 27 – Remembrance Day (Day for Martyrs and Wounded Soldiers)or(Vietnamese War Invalids and Martyrs’ Day).
August 19 – August Revolution Commemoration Day.
Autumn in Vietnam
Rains and heat remain through September and October as well as a probability of storms. Water is still warm too. November brings a drastic reduction of precipitation yet rain occurs from time to time. At September northernmost regions become sunnier but typhoons cause big waves.
But… Autumn vacation in central regions including Hanoi is quite dangerous. Until the very beginning of winter, there are occasional raging hurricanes with all the consequences. Locals get used to them but unprepared tourists can have troubles. Yet there is quiet regions dry and warm weather. Anyway, the voyage to any tropical country should be carefully planned.
September 2 – National Day.
October 10 – Capital Liberation Day.
October 13 – Vietnamese Entrepreneur’s Day.
October 20 – Vietnamese Women’s Day.
November 20 – Vietnamese Teacher’s Day.
Winter in Vietnam
December in southern regions means dry season with significantly lesser rains. All three winter months are considered as the best time for seaside vacations in southern regions. The temperature of air shifts to completely acceptable range and water have a pleasant 27 °C (81 °F). Evenings may be dedicated to wandering and gastronomic experiences in numerous cozy restaurants.
North regions during winter have rather unwelcoming weather. The temperature of the air is about 13 to 15 °C (55-59 °F). And protracted drizzle is everywhere. The central part is much warmer but swimming isn’t comfortable due to high humidity levels. In addition, there is great excitement on the sea through the whole winter.
December 22 – National Defence Day.
December 25 – Christmas Day.
January 1 – New Year.
February 3 – Day of a foundation of the Communist Party of Vietnam.
Also, there are some national celebrations which held on specific days of the Moon calendar.
I hope you have an overview of the weather and climate in Vietnam. Although there is a clear distinction between the North and the South. However, every decision on a trip depends entirely on you.
Enjoy your trip!