Best Time to Visit Hanoi
Hanoi experiences four distinct seasons, unlike the tropical south of Vietnam. Choosing when to go depends on your tolerance for humidity and extreme heat. If you want the perfect balance of dry air and manageable temperatures, October is the best time to visit Hanoi. During this month, the brutal summer heat breaks, the autumn colors emerge, and the rainfall drops significantly. You get clear skies and average temperatures between 20°C and 28°C (68°F–82°F). It is the most comfortable window for walking the Old Quarter without the sweat or the rain gear.
Hanoi Month by Month
January
Hanoi in January is cold and gray. Expect temperatures between 14°C and 20°C (57°F–68°F). The sky is often overcast with a persistent fine mist known as "crachin." You will need a jacket. Crowds are moderate, but prices spike during the Tet (Lunar New Year) period, which often falls in late January. Many shops close for the holiday, but the city’s flower markets are at their peak.
February
February remains chilly and damp, with temperatures averaging 15°C to 21°C (59°F–70°F). Humidity starts to climb. If Tet falls in February, the city becomes quiet as locals head to provinces, making it a unique time for photography but difficult for dining. A highlight is the Perfume Pagoda Festival, which begins in mid-February and sees thousands of pilgrims traveling to the limestone caves outside the city.
March
March marks the transition to spring. Temperatures rise to a comfortable 18°C to 23°C (64°F–73°F). The persistent drizzle begins to fade, though it remains cloudy. Tourist numbers increase as the weather improves. It is the best month to visit the nearby incense village, Quang Phu Cau, where workers lay out thousands of red incense sticks to dry in the sun before the high humidity hits.
April
Hanoi in April is pleasant. The sun starts to break through the clouds, and temperatures hover between 22°C and 27°C (72°F–81°F). This is the last month of low humidity before the monsoon. Prices are stable, and the city parks are lush. It is an ideal time for a day trip to Ninh Binh or Halong Bay, as the visibility over the water is generally high.
May
May is the beginning of the hot season. Temperatures jump to 25°C–32°C (77°F–90°F). Rain showers become more frequent but are usually short-lived. Crowds thin out as the heat intensifies. This is the month of the flamboyant trees (Phuong Vi), which line the streets with bright red blossoms. It is a good time to find deals on luxury hotels before the summer peak.
June
June is hot and humid. Expect temperatures to reach 35°C (95°F) with high humidity making it feel like 40°C. Heavy thunderstorms occur late in the afternoon. Prices for flights and accommodation are lower for international travelers, though domestic tourism increases. You should plan indoor activities, like visiting the Vietnam Museum of Ethnology, to escape the midday sun.
July
July is the peak of the rainy season and the hottest month. Temperatures average 29°C to 37°C (84°F–99°F). Rainfall is heavy and can cause localized flooding in the Old Quarter. Despite the heat, the city is lively. This is the best time to eat seasonal fruits like lychees and longans, which are sold by bicycle vendors on almost every street corner.
August
August remains hot, wet, and humid. Temperatures range from 27°C to 34°C (81°F–93°F). This is also the start of the typhoon season, which can occasionally disrupt flights or Halong Bay cruises. If you visit in August, stay flexible with your itinerary. Seek out the lotus ponds near West Lake (Tay Ho), which are in full bloom during this month.
September
September marks the end of the summer heat. Temperatures drop to 26°C–31°C (79°F–88°F). The rain begins to taper off, though humidity remains. The city celebrates Independence Day on September 2nd, featuring parades and flags across every building. It is a patriotic and busy time to be in the capital, so book your accommodation in advance.
October
October is the "Golden Season" in Hanoi. The weather is dry, crisp, and cool, with averages between 20°C and 28°C (68°F–82°F). This is the best time for walking tours. The smell of Hoa Sua (milkwood flowers) fills the air—a classic Hanoian experience. Expect higher prices and larger crowds at major sites like the Temple of Literature as this is the peak travel window.
November
November is cool and dry. Temperatures range from 18°C to 25°C (64°F–77°F). There is very little rain, making it perfect for outdoor exploration and trekking in nearby Sapa. Crowds are high as international tourists flock to the city for the stable weather. Use this month to explore the city’s outdoor cafes and the blossoming daisy gardens in the Nhat Tan area.
December
December is the start of winter. It is dry but can get surprisingly cold, with temperatures dipping to 15°C (59°F) or lower. The sky is often gray. While Vietnam is not a Christian country, Hanoi goes all out for Christmas decorations, particularly around St. Joseph’s Cathedral. It is a popular time for European and North American travelers seeking a cool-weather escape.
Cheapest Time to Visit Hanoi
The cheapest time to visit Hanoi is during the low season months of May, June, and September. During these windows, the intense heat or the threat of rain keeps the mass market away.
Luxury hotels that charge $200 a night in October often drop rates by 30-40% in June. You will also find cheaper internal flights within Vietnam. Avoid the Tet holiday (late Jan/early Feb) even if it’s technically in the "off-season" for weather, as transport prices triple and many budget eateries close. For the best value, aim for May; the weather is still manageable, and the price drops are significant.
When to Avoid Hanoi
You should avoid Hanoi during the peak of the Tet holiday if you are a first-time visitor. While the festive atmosphere is interesting, the city effectively shuts down for 5 to 7 days. Most museums, shops, and legendary street food stalls close. Finding food becomes a chore, and transport out of the city is booked months in advance.
Additionally, if you struggle with heat and humidity, avoid July and August. The "feels like" temperature frequently hits 45°C (113°F), and the sudden monsoon downpours can ruin a day of sightseeing. The air quality in Hanoi also tends to be worst in the winter months (December and January) due to temperature inversions, so travelers with respiratory issues should check AQI levels.
Best Time for Good Weather
For the best weather, book your trip between March and April or October and November.
- Spring (March–April): You get the transition from cold to warm. The city is green, and the humidity hasn't become oppressive yet.
- Autumn (October–November): This is the undisputed winner. You get clear blue skies, less than 5 days of rain per month, and a cool breeze that makes the 80% humidity of summer disappear.
If you plan to combine Hanoi with a trip to the northern highlands (Sapa or Ha Giang), these months also offer the best visibility and safest road conditions.
Best Time for Fewer Crowds
To avoid the crowds, visit Hanoi in the shoulder seasons: May and September.
During these months, you miss the winter influx of international travelers and the summer surge of domestic tourists. Mid-week visits to popular spots like the Ho Chi Minh Mausoleum or the Hoa Lo Prison Relic will be significantly quieter.
If you want the city to yourself, the first two days of the Lunar New Year are the only times you will see the streets of the Old Quarter empty. Just be prepared for the fact that you will have very few options for dining or shopping. For a balance of open amenities and low crowds, late September is your best bet.