Weather in Hanoi by month: what to expect

Ханой has a humid subtropical climate with two distinct seasons: a dry season and a rainy season. From November to April, the weather in Ханой is mostly dry, with cooler temperatures in the early months. The rainy season begins in May and lasts until October, bringing frequent showers and higher humidity.

Travelers visiting Ханой in the dry season will find mild and comfortable conditions, especially in December and January, when temperatures drop to around +17.8 °C. The rainy season, while wetter, still offers warm days, with temperatures often reaching +30 °C or higher in June and July.

Temperatures in Ханой vary significantly throughout the year. The coolest months are January and December, with average highs of +20.8 °C and +22.3 °C, respectively. Nights can be chilly, dropping to +15.2 °C in January, so a light jacket may be useful.

From May to September, Ханой experiences its warmest weather, with daytime highs often exceeding +30 °C. The hottest month is June, when temperatures can reach +34.7 °C. Evenings remain warm, rarely falling below +25 °C, making air conditioning a welcome relief for visitors.

The transition months of April and October offer pleasant temperatures, ranging from +22.6 °C to +28.4 °C in April and +22.7 °C to +29.6 °C in October. These months can be ideal for exploring Ханой without the extremes of heat or cold.

Rainfall in Ханой is highly seasonal, with the dry season seeing minimal precipitation. December and January are the driest months, with just 14.2 mm and 46.2 mm of rain, respectively. This makes them popular times for outdoor activities and sightseeing.

The rainy season in Ханой begins in May and peaks in August, when the city receives up to 459.6 mm of rain. Heavy downpours are common, often occurring in the late afternoon or evening. While the rain can disrupt plans, it also brings lush greenery to the city’s parks and countryside.

By November, the rains taper off, and Ханой returns to drier conditions. Travelers should be prepared for sudden showers even in the dry season, as brief rainstorms can occur year-round.

For a trip to Ханой in the cooler months of December to February, pack lightweight but warm clothing for evenings, such as long-sleeve shirts and a light sweater. Comfortable walking shoes are essential for exploring the city’s streets and markets.

During the hot and rainy season from May to September, breathable fabrics like cotton or linen will help you stay cool. A compact umbrella or rain jacket is a must, as sudden downpours are frequent. Don’t forget sunscreen and a hat to protect against the strong sun.

For the transitional months of March, April, October, and November, layers are key. Mornings and evenings can be cool, while afternoons warm up quickly. A light scarf or shawl can be useful for both warmth and sun protection.