Hanoi Weather Guide
Thanks to its location in northern Vietnam, the climate in Hanoi is warm, humid and subtropical all year round with very warm temperatures in the wet season and reasonably cool weather (by Vietnam standards) in the dry season. While there are technically only two seasons in Vietnam; the wet and dry seasons, the city also experiences transitional months similar to the standard 4 seasons.
Season and Clothing
Dry Season: October to April
By Vietnam standards, Hanoi can get quite cold during the dry season with daily temperatures averaging around 15 degrees Celsius and dropping as low as 3 degrees Celsius during the winter months from December to February. During this time, cool winds and short rain showers are common. While rain can occur, the dry season is still considered the best time to visit Hanoi with cooler temperatures and low humidity that's ideal for outdoor activities. Now is a great time to wander the streets of the Old Quarter to check out the well-preserved examples of French colonial architecture and take in the street atmosphere. Don't miss the Vietnamese lunar New Year celebration known as the Tet Holiday that hits town in late January or early February.
Average temperatures: 16 - 25 degrees Celsius.
Appropriate clothing: Clothing for layering - jeans, t-shirts, dresses and shorts.
Don't forget: Comfy walking shoes, a hat and sunnies.
Wet Season: May to September
The wet season in Hanoi is also the warmest time of year with temperatures averaging around 28 degrees Celsius and even reaching as high as 43 degrees. On average, the peak summer months from June to August experience the hottest temperatures and highest rainfall with little to no breeze - turning the city into a sweaty sauna. Temperatures in September ease slightly towards pleasant autumn-like temps for some much-needed relief. With rain often in torrential downpours with accompanying humidity sky rocketing, the wet season is Hanoi's low tourist season, so if you can stand the heat and humidity the crowds and prices are much less now. For respite from the rain, visit the Ho Chi Minh Mausoleum with a museum, Presidential Palace and the former leader's stilted house also within the grounds.
Average temperatures: 25 -31 degrees Celsius.
Appropriate clothing: Summer clothes and waterproof shoes.
Don't forget: Sunscreen, sunglasses and an umbrella.