Hanoi Weather in January

January is the coldest month in Hanoi throughout the year, yet there is no bone-chilling feeling. Instead, the weather stays cool and comfortable most of the time, and with scarce rainfall, it is ideal for traveling.

What Is the Temperature Like in Hanoi in January?

In Hanoi during January, the diurnal temperature variation is quite significant. Daytime temperatures hover between 21 - 25 degrees Celsius (70 - 77 degrees Fahrenheit), creating a comfortably mild environment akin to a naturally air-conditioned room. Nighttime temperatures drop to 12 - 18℃ (54 - 64℉), so a light jacket is essential to keep warm. Occasionally, strong northeast winds blow, causing the temperature to plummet by 7 - 10℃ (45 - 50℉) - at such times, even a light down jacket is recommended.

How Much Precipitation does Hanoi Get in January?

In January, Hanoi sees just 8 rainy days, with a monthly average rainfall of a mere 19 mm - making it the driest month of the year. The rain this month is mostly fine drizzle that may linger for hours on end, yet it only wets the ground and rarely forms puddles, so it barely disrupts your travel plans.

How Long Are Daylight Hours/Sunshine Hours in January?

January in Hanoi sees sunrise between roughly 6:32 and 6:36, with sunset falling between 17:27 and 17:47 - resulting in a total daylight duration of about 11 hours. However, under the influence of the northeast monsoon, cloud cover is prevalent throughout the month; coupled with fog that forms as a result of high humidity, low temperatures and the absence of strong convection, average daily sunshine hours are limited to a mere 3 hours. As a result, the sky often looks gloomy and outdoor scenery takes on a grayish hue.

How about the Haze Conditions in January?

Hanoi already suffers from a certain degree of haze pollution due to its endless streams of motorcycles, and in January, the practice of crop residues burning in farmlands further exacerbates air pollution. The city’s AQI even surges to over 200 during this month, ranking Hanoi among the world’s cities with the worst air quality - a situation that undoubtedly poses considerable challenges to outdoor activities.

Is January a Good Time to Visit Hanoi?

Although Hanoi may experience occasional haze and tend to be overcast in January, it is generally a good time for traveling: the weather is neither too cold nor too hot, with little rainfall and no extreme climate conditions like typhoons, which will barely disrupt your itinerary.

What’s more, traveling in January of 2027, you won’t encounter the crowds of both Christmas and Vietnamese New Year, and do not have to wait in long lines at popular attractions like St. Joseph’s Cathedral. While accommodation and flight prices are slightly higher than in the low season, they are still much more cost-effective compared to the significant price hikes during the Vietnamese New Year - and booking in advance can also secure considerable discounts.

What to Wear for Hanoi Trips in January

Upper Body: It is mainly recommended to bring some short-sleeved T-shirts, long-sleeved T-shirts and shirts as base layers. Additionally, jackets or thin sweaters should be included for warmth. If you are particularly sensitive to the cold, it is suggested to bring a light down jacket to cope with sudden drops in temperature.

Lower Body & Shoes: Prepare jeans or casual pants. For feet, you can bring sports shoes and walking shoes.

Travel Advices in Hanoi in January, 2027

1. In the early mornings of January, Hoan Kiem Lake is often shrouded in light mist, making it the perfect time to enjoy the lake views. The Temple in the Lake is hidden in the mist, exuding a natural hazy charm. When the sunlight pierces through the mist, the lake surface sparkles with ripples like scattered gold. The gradual dissipation of the mist unfolds like a dynamic light and shadow show - every snapshot turns out to be a stunning scene.

Apart from Hoan Kiem Lake, most outdoor attractions in Hanoi - such as the Old Quarter and the 36 Streets - lose much of their charm on foggy days. It’s recommended to visit them after 10 a.m., when temperatures rise and the morning mist has fully dissipated.

2. When the temperature drops in Hanoi during January, it’s the perfect opportunity to indulge in all kinds of hot and delicious food. We highly recommend you not to miss the piping hot beef pho: the broth is simmered with beef bones, rich and flavorful; the beef is tender - simply amazing in texture. With each bite, it warms your body and chases away the cold, letting you immerse yourself in local culinary culture.

Tips

1. January is the peak period for haze in Hanoi. It is recommended to prepare N95 or KN95 anti-haze masks. If the AQI index is seriously exceeded, try to reduce the time spent outdoors and prioritize visiting indoor attractions such as the Vietnam National Museum of History to prevent respiratory discomfort.

2. In January, Hanoi has a significant temperature difference between day and night. The temperature at night can even drop below 10℃ (50℉), which can easily cause a cold. It is recommended to carry common cold and fever medicines with you.

3. January is the peak tourist season in Hanoi. It is recommended to book your flights and accommodations in advance to avoid unviability and last-minute price surges. Also, remember to make reservations ahead of time for popular attractions and restaurants to ensure a smooth trip.

Hanoi Weather by Month