Climate in Hanoi, Vietnam

By | November 3, 2023

Hanoi, the capital city of Vietnam, is known for its rich history, vibrant culture, and diverse cuisine. Its climate plays a significant role in shaping daily life, agriculture, and the cultural fabric of the city. Hanoi experiences a distinct four-season climate that reflects its position in northern Vietnam. In this comprehensive description, we will explore the climate of Hanoi, its seasonal variations, and the factors that influence its weather patterns.

Geographical Location and Topography:

According to andyeducation, Hanoi is located at approximately 21.0285° N latitude and 105.8542° E longitude, situated in the northern part of Vietnam. The city is nestled along the banks of the Red River (Song Hong), which flows through the northern part of the country. Hanoi’s topography is relatively flat, with low-lying areas near the river and scattered lakes throughout the city. The surrounding region consists of low hills and mountains, with the Hoàng Liên Son mountain range to the northwest and the Gulf of Tonkin to the east.

Climate Classification:

Hanoi falls under the classification of a humid subtropical climate, designated as Cwa in the Köppen climate classification system. This climate type is characterized by distinct seasons, with a hot and humid summer, a cool and dry winter, and transitional periods in between.

Seasonal Variations:

Hanoi Winter (December – February): Hanoi experiences its winter season from December to February. This period is characterized by cool and dry weather, with temperatures dropping to their lowest points of the year. Daytime highs typically range from 15°C to 20°C (59°F to 68°F), and nighttime lows can dip down to 8°C to 14°C (46°F to 57°F).

While Hanoi’s winter is relatively mild compared to some northern cities, it can feel quite chilly, especially in January when temperatures are at their lowest. The cityscape takes on a cozy and festive atmosphere during the lunar New Year holiday, known as Tet, which typically falls in late January or early February.

Hanoi Spring (March – April): Spring in Hanoi is a delightful time marked by gradually warming temperatures and blooming flowers. Daytime highs rise from 20°C to 25°C (68°F to 77°F), and the city starts to emerge from its winter slumber. March and April are considered the best months to visit Hanoi, as the weather is pleasantly mild, and the city’s parks and gardens come to life with colorful blossoms.

Hanoi Summer (May – August): Summer in Hanoi is characterized by hot and humid weather, with temperatures ranging from 30°C to 35°C (86°F to 95°F) during the day. Humidity levels are high, making the weather feel even hotter. Occasional afternoon thunderstorms provide relief from the heat, but they can also bring heavy rainfall.

The summer months, especially June to August, are the rainiest of the year, with frequent downpours and occasional flooding in low-lying areas. Despite the heat and humidity, this season has its charm, as it is a time of lush greenery, vibrant street life, and festivals.

Hanoi Autumn (September – November): Autumn in Hanoi is a season of transition when the weather begins to cool down from the heat of summer. Daytime temperatures range from 25°C to 30°C (77°F to 86°F), and humidity levels gradually decrease. September and October are particularly pleasant, with lower rainfall and a comfortable atmosphere.

The autumn foliage, with its golden leaves, creates a picturesque backdrop for the city’s parks and tree-lined streets. This season is also associated with harvest festivals and celebrations, making it an enjoyable time to explore Hanoi’s culture and traditions.

Precipitation and Humidity:

According to existingcountries, Hanoi experiences a distinct wet and dry season, with the majority of rainfall occurring during the summer months. The city receives an average annual precipitation of approximately 1,800 millimeters (71 inches). The wet season typically spans from May to September, with July and August being the rainiest months, receiving around 300 to 400 millimeters (12 to 16 inches) of rain per month.

Humidity levels in Hanoi are relatively high throughout the year, particularly during the summer. Humidity can exceed 80% during the hottest months, contributing to the muggy feel of the weather. However, humidity levels drop significantly during the autumn and winter months, making those seasons more comfortable.

Tropical Storms and Typhoons:

Hanoi and northern Vietnam are vulnerable to tropical storms and typhoons, especially during the late summer and early autumn months. These storms can bring heavy rainfall, strong winds, and the potential for flooding and damage. The city and its residents are well-prepared for such events, with warnings and evacuation plans in place to minimize the impact.

Climatic Influence on Culture and Agriculture:

Hanoi’s climate has a profound influence on the city’s culture and agriculture. The Lunar New Year (Tet) celebration, for example, is closely tied to the changing seasons and marks the transition from winter to spring. Farmers in the surrounding countryside rely on the seasonal rainfall patterns for rice cultivation, with the wet season providing essential water for the paddies.

Hanoi’s climate also plays a role in shaping its culinary traditions. Street food and local dishes often adapt to the changing seasons, with hot and hearty meals favored in the winter and refreshing, cool dishes enjoyed in the summer.


In conclusion, Hanoi, Vietnam, experiences a humid subtropical climate with four distinct seasons. Its geographical location, topography, and proximity to the Red River influence its climate characteristics. The city’s climate plays a significant role in daily life, culture, and agriculture, from the festive celebrations of Tet to the cultivation of rice paddies in the countryside. While Hanoi’s summers can be hot and humid, its mild winters and pleasant spring and autumn seasons make it an inviting destination for travelers throughout the year. The unique blend of weather patterns, cultural traditions, and culinary delights make Hanoi a vibrant and dynamic city in northern Vietnam.