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Contents
- The climate of Hanoi
- The best time to visit Hanoi
- The worst time to visit Hanoi
- Spring weather in Hanoi
- Summer weather in Hanoi
- Autumn weather in Hanoi
- Winter weather in Hanoi
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The beautiful Tran Quoc Pagoda in Hanoi, Vietnam
The climate of Hanoi
Based on the Köppen climate classification, Hanoi, the capital of Vietnam, experiences a Cwa climate. This classification indicates a humid subtropical climate with dry winter conditions. The geographical location of Hanoi plays a pivotal role in shaping its climate, resulting in diverse weather patterns throughout the year.
Analyzing the provided climate parameters indicates a significant fluctuation in monthly temperatures, humidity, rainfall, and sunlight hours. The monthly average temperature ranges from 14.4°C (57.9°F) in winter to an impressive 35.4°C (95.7°F) during the summer months. Concurrently, the relative humidity fluctuates between 69% and 80%, showing a higher prevalence of moisture in the air during the latter part of the year.
Rainfall and daylight patterns follow an interesting trend. Rainfall varies quite substantially from a minimal 7mm (0.28") in February to a hefty 135mm (5.31") in August. Likewise, daylight hours oscillate from a low of 10.9 hours in December to a peak of 13.4 hours in June. Sunshine hours, on the other hand, are highest in the summer months from May to July, reaching up to 10.1 hours in June before receding again.
Analyzing the provided climate parameters indicates a significant fluctuation in monthly temperatures, humidity, rainfall, and sunlight hours. The monthly average temperature ranges from 14.4°C (57.9°F) in winter to an impressive 35.4°C (95.7°F) during the summer months. Concurrently, the relative humidity fluctuates between 69% and 80%, showing a higher prevalence of moisture in the air during the latter part of the year.
Rainfall and daylight patterns follow an interesting trend. Rainfall varies quite substantially from a minimal 7mm (0.28") in February to a hefty 135mm (5.31") in August. Likewise, daylight hours oscillate from a low of 10.9 hours in December to a peak of 13.4 hours in June. Sunshine hours, on the other hand, are highest in the summer months from May to July, reaching up to 10.1 hours in June before receding again.
The best time to visit Hanoi
For those looking to experience Hanoi's comfortable weather, October and November prove ideal. During these months, temperatures range from 19.3°C (66.7°F) to 29.6°C (85.3°F) accompanied by a moderate amount of rainfall ranging between 20mm (0.79") and 46mm (1.81"). Sunshine duration ranges from 5.1 to 6.9 hours, providing plenty of daylight to explore the city's historic charm and natural beauty.
The worst time to visit Hanoi
August could be considered an unfavorable time to plan a visit to Hanoi. The city receives the highest rainfall during this month, averaging around 135mm (5.31"). Consequently, the relative humidity also peaks during this time, reaching 80%. July and August experience similarly high humidity, but July generally sees slightly less rainfall. Despite this, the robust temperatures from 26.3°C (79.3°F) to 34°C (93.2°F) could still appeal to those who enjoy tropical climate conditions.
Spring weather in Hanoi
The onset of spring carries a gradual rise in temperature from 14.4°C (57.9°F) in February, peaking at 21.8°C (71.2°F) in April. Rainfall also begins to increase, contributing to enhanced humidity levels. Sunshine hours start to extend noticeably, offering between 4.2 hours and 7.2 hours of sunlight in a day.
Summer weather in Hanoi
Summer in Hanoi is typically hot and humid, with the mercury soaring up to 35.4°C (95.7°F) and humidity levels oscillating between 71% and 74%. Ample sunshine hours ranging from 9 hours to 10.1 hours amplify this effect. Rainfall reaches its peak during this season, especially in August with approximately 135mm (5.31").
Autumn weather in Hanoi
Autumn sees a decline in temperature and rainfall rates compared to summer. The average temperature swings between 24.2°C (75.6°F) and 29.6°C (85.3°F), while the rainfall drops down to between 46mm (1.81") and 73mm (2.87"). The daylight hours reduce slightly from 12.3 in September to 11.2 in November.
Winter weather in Hanoi
The winter season ushers in cooler temperatures, dropping to as low as 14.4°C (57.9°F) in December and slowly rising to 19.2°C (66.6°F) in February. Rainfall remains relatively low, with figures averaging between 15mm (0.59") to 18mm (0.71"). Sunshine hours decrease to a yearly low of 4.7 hours in December but improve to 5.7 hours by February. Wind speed generally remains between 7.7km/h (4.8mph) to 7.8km/h (4.8mph) during this period.
Weather in January
Kickstarting the year in Hanoi, January tends to be cooler when compared to the other months. This coolness contributes to making it the month with the lowest relative humidity throughout the year at 69%. The new year also carries the lowest rainfall, with the minimal precipitation recorded from 15mm (0.59"). Weather in January »
Weather in February
February brings a shift in the weather pattern with a creep-up in temperature, making it warmer than January. A noteworthy characteristic of Hanoi's February weather is its daylight duration, extending to approximately 11.5 hours. Weather in February »
Weather in March
The month of March exhibits Hanoi transitioning into the Spring weather, indicated by a further increase in temperature. Also during this period, a striking feature of the weather can be observed in the hike of the relative humidity to 74%. Weather in March »
Weather in April
Summer reigns in April and Hanoi dresses up in high temperatures, making it one of the warmer months. Of note here, the maximum temperature recorded shoots up significantly to 30.8°C (87.4°F). This signals the commencement of the city's hot months. Weather in April »
Weather in May
May in Hanoi signals mid-summer with the city experiencing higher temperatures and significant humidity. The city's peak daytime temperature reaches a scorching 34°C (93.2°F), highlighting the typical tropical summer. With increased rainfall, May also initiates the onset of the monsoon. Weather in May »
Weather in June
June maintains the summertime climate from May, represented by comparatively high humidity and temperature levels. Interestingly, daylight hours peak at 13.4 hours in June, the longest in the year. This extended daylight provides a longer time frame for tourists to explore the beauty of Hanoi. Weather in June »
Weather in July
Hanoi's July weather forms the heart of summer with high temperatures, increased humidity, and vigorous rain. Indeed, this latter parameter reaches its annual zenith with approximately 92mm (3.62") of rainfall, suggesting the heaviest downpours of the year occur in July. Weather in July »
Weather in August
August carries forward the high summer temperatures from July but grants Hanoi a slight relief from rain with a slight decrease in precipitation. This month indeed crowns itself with the maximum average relative humidity of 80%. Weather in August »
Weather in September
The weather in September brings about somewhat cooler temperatures compared to the previous summer months. Significantly, compared to August, precipitation decreases considerably to 73mm (2.87"). This dip in rainfall coupled with lower temperatures signifies the commencement of autumn. Weather in September »
Weather in October
October in Hanoi brings in the autumn with slightly chillier temperatures. A remarkable attribute of this month's weather would be the sharp decrease in precipitation to 46mm (1.81"), compared to the previous high rainfall months. Weather in October »
Weather in November
November's weather in Hanoi continues to carry the beauty of autumn presented by October. However, November distinguishes itself with the least number of sunshine hours, recorded at just 5.1 hours. The shorter sunshine duration and dropping temperatures paint a picturesque canvas, inviting visitors to experience Hanoi's serene and scenic landscapes. Weather in November »
Weather in December
Concluding the year, December in Hanoi witnesses further plummeting of the thermometer, marking the beginning of winter. The prominent weather attribute for this month rests in its usable daylight, reducing to an annual low of just 10.9 hours. Weather in December »
Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
The coldest period is January, when temperatures fluctuate between an average high of 20.7°C (69.3°F) and a low of 14.4°C (57.9°F).
How much does it rain?
In Hanoi, during the entire year, the rain falls for 181.2 days and collects up to 595mm (23.43") of precipitation.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.7h of sunshine.
What is the driest month?
The month with the least rainfall in Hanoi is February, when the rain falls for 7.8 days and typically collects 7mm (0.28") of precipitation.
What are the months with the highest UV index?
The months with the highest UV index are May through September, with an average maximum UV index of 7.
What time of the year is the hottest?
The month of June, characterized by an average high of 35.4°C (95.7°F) and a low of 26.6°C (79.9°F), is recognized as the warmest.
When are the longest days?
The month with the longest days is June, with an average of 13h and 24min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.1h of sunshine.
What is the most humid month?
The months with the highest humidity in Hanoi are August and September, with an average relative humidity of 80%.
What is the wettest month?
The month with the most rainfall is August, when the rain falls for 21.5 days and typically aggregates up to 135mm (5.31") of precipitation.
What is the least humid month?
December is the least humid month, with an average relative humidity of 69%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 10h and 54min of daylight.
Is there Daylight Saving Time (DST)?
Hanoi, Vietnam, does not observe Daylight Saving Time (DST). +07 timezone is used throughout the entire year.
What is the month with the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 4.
Average temperature
Hanoi, Vietnam
The warmest month (with the highest average high temperature) is June (35.4°C).
The month with the lowest average high temperature is January (20.7°C).
The month with the highest average low temperature is June (26.6°C).
The coldest month (with the lowest average low temperature) is January (14.4°C).
Average pressure
Hanoi, Vietnam
- Average pressure in January:
1019.2mbar - Average pressure in February:
1016.5mbar - Average pressure in March:
1014.1mbar - Average pressure in April:
1010.7mbar - Average pressure in May:
1006.7mbar - Average pressure in June:
1003.1mbar
- Average pressure in July:
1003.3mbar - Average pressure in August:
1004.3mbar - Average pressure in September:
1008.5mbar - Average pressure in October:
1013.8mbar - Average pressure in November:
1016.4mbar - Average pressure in December:
1019.1mbar
The month with the highest atmospheric pressure is January (1019.2mbar).
The month with the lowest atmospheric pressure is June (1003.1mbar).
Average wind speed
Hanoi, Vietnam
- Average wind speed in January:
8.1km/h - Average wind speed in February:
9.4km/h - Average wind speed in March:
9.9km/h - Average wind speed in April:
9.5km/h - Average wind speed in May:
8.7km/h - Average wind speed in June:
8.2km/h
- Average wind speed in July:
7.6km/h - Average wind speed in August:
6.9km/h - Average wind speed in September:
6.9km/h - Average wind speed in October:
7.9km/h - Average wind speed in November:
7.7km/h - Average wind speed in December:
7.8km/h
The windiest month (with the highest average wind speed) is March (9.9km/h).
The calmest months (with the lowest average wind speed) are August and September (6.9km/h).
Average humidity
Hanoi, Vietnam
The months with the highest relative humidity are August and September (80%).
The month with the lowest relative humidity is December (69%).
Average rainfall
Hanoi, Vietnam
The wettest month (with the highest rainfall) is August (135mm).
The driest month (with the least rainfall) is February (7mm).
Average rainfall days
Hanoi, Vietnam
- Average rainfall days in January:
10.5 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
13.1 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
18.7 days - Average rainfall days in June:
19.5 days
- Average rainfall days in July:
23.3 days - Average rainfall days in August:
21.5 days - Average rainfall days in September:
18.5 days - Average rainfall days in October:
14 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
8.9 days
The month with the highest number of rainy days is July (23.3 days).
The month with the least rainy days is February (7.8 days).
Average daylight / Average sunshine
Hanoi, Vietnam
- Average daylight in January:
11h and 0min - Average daylight in February:
11h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 4min - Average daylight in May:
13h and 1min - Average daylight in June:
13h and 2min
- Average daylight in July:
13h and 2min - Average daylight in August:
12h and 5min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 4min - Average daylight in November:
11h and 1min - Average daylight in December:
10h and 5min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
4h and 1min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 1min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 3min - Average sunshine in September:
8h and 3min - Average sunshine in October:
6h and 5min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Hanoi, Vietnam
- Average sunshine days in January:
15.3 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
10.5 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
8.3 days
- Average sunshine days in July:
6.2 days - Average sunshine days in August:
7.9 days - Average sunshine days in September:
9.5 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
16.4 days - Average sunshine days in December:
19.6 days
The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is July (6.2 days).
Average UV index
Hanoi, Vietnam
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).
Average cloud cover
Hanoi, Vietnam
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is June (Cloud cover 40).
Average visibility
Hanoi, Vietnam
The months with the highest visibility are February, March and June (10km).
The months with the lowest visibility are January, April, May, July, August, September, October, November and December (9km).
Hanoi, Vietnam
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