Hanoi, Vietnam – Climate and Average Weather Year Round Explained

Hanoi, the capital city of Vietnam, experiences a humid subtropical climate with distinct seasonal variations.

Summers are hot and humid, while winters are cooler and drier.

The hottest month of the year in Hanoi is June, with temperatures often reaching around 92°F. In contrast, January is the coldest month, with average low temperatures dropping to 57°F.

Throughout the year, rainfall is a common occurrence in Hanoi. The city receives significant rainfall even during the driest months, which makes carrying an umbrella a wise choice year-round.

For example, February typically sees about 7mm of rain over approximately 7.8 days.

Hanoi’s weather is well documented, and historical data provides insights into the city’s climatic patterns.

The average yearly temperature stands at 74.4°F, and the annual precipitation totals about 69.3 inches.

Such detailed climate and weather information helps residents and visitors prepare for the diverse weather conditions throughout the year.

Average Temperature in Hanoi, Vietnam

Hanoi experiences a wide range of temperatures throughout the year.

January is the coldest month with an average high of 68°F and a low of 57°F.

February is slightly warmer, with temperatures rising a bit more, leading into spring.

Spring months of March and April see temperatures averaging between 72°F and 81°F.

May begins to see higher temperatures, often reaching 86°F.

The hottest month is June, with an average high temperature of 92°F and a low of 79°F.

July and August continue to be warm, maintaining highs around the low 90s°F.

In September, temperatures start to decrease but remain relatively warm.

October sees mild temperatures averaging around 77°F.

November continues to cool down, featuring highs around 73°F.

December sees cooler temperatures, with average highs around 72°F.

The mean yearly temperature in Hanoi is 74.4°F.

Here’s a quick overview:

Each month offers a distinct climate, making Hanoi a city of diverse weather patterns year-round.

Average Precipitation in Hanoi, Vietnam

Hanoi experiences significant rainfall, particularly during the monsoon season. While snow is rare, understanding the average precipitation patterns can help visitors plan their trips better.

Average Rainfall in Hanoi, Vietnam

Hanoi has a subtropical climate with notable rainfall throughout the year. The wettest months are from June to September, coinciding with the monsoon season in Southeast Asia.

During these months, heavy rains are common, contributing to the city’s lush greenery.

The city averages around 69.3 inches of precipitation annually. June is the month with the most rainfall, bringing about 10 inches. February is the driest month, recording about 0.28 inches of rain.

A table showing monthly averages can be helpful:

Average Snow in Hanoi, Vietnam

Snowfall is extremely rare in Hanoi due to its warm and temperate climate. The city experiences very mild winters with temperatures rarely dropping low enough to allow for snow.

January is the coldest month with average lows of 57°F. Despite these cooler temperatures, snowfall is not a concern for residents or visitors.

Instead, winter sees more foggy and drizzly days with some light rain.

For those interested in snow and ice conditions in nearby regions, exploring specific articles on this subject might be helpful.

Average Sun in Hanoi, Vietnam

Hanoi experiences varying sunshine hours and daylight throughout the year. The city also has distinct changes in solar energy, especially during the summer and winter months.

Average Daily Shortwave Solar Energy in Hanoi, Vietnam

The daily shortwave solar energy in Hanoi varies by month.

During the summer, particularly in June and July, the city experiences the highest solar energy levels. This period coincides with longer daylight hours and increased sunshine.

Below is a summary table showcasing average daily shortwave solar energy:

Hanoi’s peak solar energy in May makes it an ideal month for activities requiring maximum daylight.

The shortest daylight hours are generally experienced in December and January, contributing to lower solar energy.

The UV index in Hanoi remains high, especially during summer. This necessitates sunscreen and protective clothing to avoid sunburns.

The distribution of sunshine hours and daylight is crucial for planning outdoor activities, energy production, and daily routines.

Average Humidity in Hanoi, Vietnam

Hanoi has a humid subtropical climate with high levels of humidity year-round. This can make the city feel warmer than it actually is.

The average relative humidity in Hanoi typically ranges between 70% and 85%.

The humidity is generally higher in the summer months due to the monsoon season.

Monthly Average Relative Humidity (%)

The dew point in Hanoi stays relatively high, often fluctuating between 58°F and 75°F.

Higher dew points mean more moisture in the air, which can cause discomfort due to a sticky feeling.

Monthly Average Dew Point (°F)

Average Wind in Hanoi, Vietnam

The wind in Hanoi varies throughout the year. The average wind speed is approximately 6 mph.

During the cooler months, it tends to be less windy. In February, the average wind speed is around 10 kph (6 mph).

The winter months are typically calmer, while the summer sees an increase in wind.

Below is a table with the average wind speeds by month:

The summer months, particularly June and August, often experience the highest average wind speeds.

For detailed wind information, one can explore articles on wind patterns.

Average Air Quality in Hanoi, Vietnam

Hanoi’s air quality varies throughout the year. The Air Quality Index (AQI) can range from good to unhealthy levels, influenced by traffic, industrial activity, and weather conditions.

Monthly Air Quality Summary

Key Influences on Air Quality

1. Traffic Emissions: Heavy traffic contributes significantly to poor air quality.
2. Industrial Pollution: Local industries release pollutants into the air.
3. Weather Conditions: Weather, including wind and rain, can affect pollutant levels.

Recommendations for Residents

• Stay Informed: Check daily AQI updates through services like IQAir or AccuWeather.
• Limit Outdoor Activities: On days with poor air quality, reduce time spent outdoors.
• Use Air Purifiers: Install air purifiers at home to improve indoor air quality.

Topography of Hanoi, Vietnam

Hanoi is located in the northern region of Vietnam. It lies in the Red River Delta, a low-lying region with an average elevation of 15.72 meters (51.57 feet) above sea level. This makes the area prone to flooding, especially during the rainy season.

The Red River flows through the city, creating a network of canals and lakes. West Lake and Truc Bach Lake are two of the largest lakes in Hanoi. These bodies of water contribute to the city’s unique landscape.

Features of Hanoi’s Topography

• Red River Delta: Main geographic feature.
• Elevation: 51.57 feet (15.72 meters).
• Natural Water Bodies: Includes West Lake and Truc Bach Lake.
• Flooding Risk: Due to low elevation.

The city is surrounded by smaller hills and mountains. To the north, the mountainous regions of Tam Dao and Ba Vi play a crucial role in Hanoi’s climate patterns. They act as natural barriers, affecting rainfall and weather conditions.

Noi Bai International Airport, about 13 miles north of the city, sits in a relatively flat area. This location eases air traffic operations, making it a critical hub for regional and international flights.

The regional geography and landscape greatly influence the daily life and planning needs of Hanoi. By understanding these features, one can better appreciate the city’s challenges and beauty.

Extreme Weather Events That Occur in Hanoi, Vietnam

Hanoi experiences various extreme weather events throughout the year due to its tropical monsoon climate. These events can significantly impact daily life and the environment.

Monsoons are a major factor in Hanoi’s climate. The monsoon season typically lasts from May to October, bringing heavy rainfall and occasional flooding. During this period, it’s not unusual for rain to accumulate to several inches in a single storm.

Heatwaves are another common event. In recent years, temperatures have soared to record highs. For example, Hanoi recorded its highest-ever temperature of 44.1°F (BBC News). These heatwaves can be particularly brutal during the summer months.

Monthly Rainfall and Temperature Extremes:

Hanoi is also prone to severe hailstorms. These can occur mostly during the transitional periods between seasons, particularly in spring and fall. Hail can damage crops, vehicles, and buildings.

Flooding is a recurrent issue, especially in low-lying areas. Torrential rains during the monsoon season can lead to streets and homes being submerged. Scientists have warned that such events are becoming more intense and frequent (CNA).

Best Time of the Year to Visit Hanoi, Vietnam

Hanoi experiences varied weather in different seasons, making certain times of the year more favorable for visiting than others. Each season offers unique experiences in terms of temperature, rainfall, and activities.

What Is Hanoi, Vietnam Like in Spring

Spring in Hanoi spans March through April. The weather is comfortably warm, with average temperatures ranging from 68 to 77°F. Rainfall is moderate, and the city showcases vibrant blossoms and lush green landscapes.

Table:

During spring, visitors can enjoy outdoor activities like strolling around Hoan Kiem Lake, visiting the Hanoi Botanical Garden, or exploring ancient temples. This time is also ideal for experiencing local festivals and traditional events.

What Is Hanoi, Vietnam Like in Summer

Summer in Hanoi runs from May to September. This season is hot and humid, with daily temperatures averaging between 86 and 100°F. Rainfall is frequent, especially in July and August, which also brings occasional typhoons.

Table:

Touring outdoor attractions like Hoan Kiem Lake can be uncomfortable during this wet and heat-intensive period. Nonetheless, it remains a lively time with various local festivities and abundant street food markets to explore indoors.

What Is Hanoi, Vietnam Like in Fall

Fall in Hanoi is generally from October to November. The weather is cooler and more comfortable, with temperatures between 68 and 81°F. Rainfall decreases significantly, making the environment pleasant and less humid.

Table:

Fall is an excellent period for outdoor activities and sightseeing. Visitors can comfortably walk the streets, visit the Old Quarter, and experience the city’s cultural richness without the discomfort of summer heat or excessive rain.

What Is Hanoi, Vietnam Like in Winter

Winter in Hanoi lasts from December to February.

Temperatures are cooler, ranging from 57 to 68°F. Rainfall is minimal, making it one of the driest times of the year.

Table:

This season is favorable for tourists who prefer mild weather.

Attractions like the Ho Chi Minh Mausoleum and the Temple of Literature are more enjoyable without the heat and crowds.

Winter in Hanoi also features festive decorations and celebrations leading up to the Lunar New Year.