Last updated: August 28, 2025
In August, Hanoi experiences a tropical climate, characterized by a maximum temperature soaring up to 39°C (102°F) and an average of 29°C (85°F), while the minimum dips to a comfortable 24°C (76°F). This month is marked by considerable precipitation, totaling 378 mm (14.9 in) over approximately 22 rainy days, contributing to a high humidity level of 89%. Visitors should be prepared for the combination of heat and moisture, making light clothing and hydration essential for enjoying the vibrant streets of Vietnam's capital.
In August, Hanoi experiences a warm and humid climate, with temperatures showing a notable consistency from the previous months. The minimum temperature hovers around 24°C (76°F), while the average reaches a balmy 29°C (85°F), peaking at a maximum of 39°C (102°F). This month typically marks the zenith of summer heat, reflecting a gradual increase leading up from the previous months, particularly June and July. As the hottest time of year, August offers a blend of sweltering days and the occasional refreshing breeze, making it a vibrant period for both locals and tourists to enjoy the city's lively atmosphere amidst the heat. With September ushering in slightly cooler temperatures, the end of summer is on the horizon, creating a sense of urgency to relish the warmth while it lasts.
August is typically the wettest month in Hanoi, Vietnam, with an impressive 378 mm (14.9 inches) of precipitation over 22 days. This significant rainfall marks a peak in the monsoon season, contributing to the overall lushness of the region. Following a steady rise in precipitation since April, where amounts start at 147 mm (5.8 in), the city experiences a notable spike in July and August, highlighting the intense moisture that characterizes this time of year. The heavy rain not only replenishes local water sources but also brings lush greenery, transforming the landscape into a vibrant display of nature. As September approaches, rainfall begins to taper off, creating a transition to the drier autumn months.
August in Hanoi, Vietnam, is characterized by high humidity levels, averaging 89%, which marks a slight decrease from the peak of 90% in July. This period signifies the height of the monsoon, where humidity consistently escalates from the milder months like January (66%) and April (64%) to peak levels in the summer. Following the humid July, August maintains this sticky atmosphere, offering a preview of the gradual decline into September, which records an 82% humidity. The overall trend highlights Hanoi's tropical climate, where humidity tends to rise sharply during the summer months, creating a warm and moist environment ideal for lush vegetation, yet challenging for comfort.
In August, Hanoi experiences a UV Index of 13, categorized as extreme, indicating that sun exposure can quickly lead to skin damage. This mirrors the trend observed from May through September, where the UV Index remains consistently high, demanding caution during outdoor activities. As the summer progresses, the city’s UV levels peak from May to August, with burn times decreasing to just 10 minutes across these months. Notably, August shares this extreme level with July and September, suggesting that the sun's intensity maintains its grip even as summer begins to wane. For those planning to explore the vibrant streets of Hanoi, it's essential to stay protected from the sun's harmful rays. For more detailed information, visit Hanoi UV Index.
UV Risk Categories
August in Hanoi, Vietnam, brings a delightful embrace of sunshine, boasting 259 hours of bright, sunny days. This month stands out as part of a spectacular summer, following closely behind July’s impressive 274 hours. The trend shows a remarkable peak in sunlight from May to July, where Hanoi basks in over 250 hours of sunshine, creating a vibrant atmosphere for both locals and tourists alike. Although August sees a slight dip, it still retains a generous amount of daylight, paving the way for the gradual transition into the cooler months ahead. As the year progresses into September with 267 hours, the enduring warmth of summer lingers, allowing everyone to savor the city’s lush green scenery and rich cultural experiences under the soft glow of the sun.
In Hanoi, Vietnam, the likelihood of sunny weather experiences a notable dip in August, with only 13% chance of sunshine, paralleling the trend seen in the preceding month of July. This decline highlights the onset of the monsoon season, as the city transitions from the heat of summer to a more humid and unpredictable climate. In contrast to the sunnier months earlier in the year, such as November and December, which boast chances of sunlight as high as 36% and 45%, August paints a different picture. Travelers and locals alike may want to prepare for cloudier days and scattered showers during this time, as the weather pattern clearly indicates a shift towards increased precipitation.
In Hanoi, Vietnam, August brings about a shift in daylight as the summer season begins to wane. With 12 hours of daylight, the city enjoys a balance that mirrors the transition from the long, sun-drenched days of earlier months, where May through July bask in 13 hours of light. As late summer sunsets gradually shorten, this gradual decrease hints at the upcoming autumn months where daylight will continue to taper. The pattern reveals a clear seasonal rhythm: January and December offer the least daylight at just 10 hours, while the spring months march toward longer days, peaking in March and April with 12 hours. This cyclical dance of light not only influences daily routines but also sets the stage for Hanoi’s vibrant cultural life and picturesque sunsets.
In Hanoi, the August winds tend to be the calmest of the year, with an average speed dropping to just 1.7 m/s (4 mph). This marks a notable decrease from the more vibrant breezes of earlier summer months, where winds peak at 2.8 m/s (6 mph) in May. As the sweltering heat of July gives way to the monsoon season, the gentle August air carries a sense of tranquility, inviting locals and visitors alike to bask in the serene atmosphere. Following this lull, winds gradually regain momentum in October, highlighting an intriguing seasonal shift as Hanoi transitions toward cooler, more dynamic weather patterns. The subtle ebb and flow of wind speeds not only shapes the climate but also adds a poetic touch to the city’s vibrant life and culture.
Weather in Hanoi varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Hanoi, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present a stark contrast in weather. In August, temperatures can soar as high as 39°C (102°F), with an average around 29°C (85°F) and significant humidity at 89%. This month also experiences heavy rainfall, totaling 378 mm (14.9 inches) over approximately 22 days. In contrast, January offers a much cooler climate, with temperatures peaking at a maximum of 29°C (84°F) and averaging a mild 18°C (65°F). Additionally, it sees much less rain, with only 58 mm (2.3 inches) of precipitation over about 8 days and lower humidity at 66%. For more details on Hanoi's January weather, you can refer to Hanoi weather in January.
August and February showcase contrasting weather patterns. August experiences high temperatures, with a minimum of 24°C (76°F), an average of 29°C (85°F), and a peak of 39°C (102°F), coupled with substantial rainfall of 378 mm (14.9 in) over 22 days and a high humidity level of 89%. In stark contrast, February boasts a cooler climate with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 31°C (88°F) and a much lower average of 19°C (66°F). Rainfall in February is also minimal, with only 41 mm (1.6 in) across 7 days, and humidity levels drop to a more comfortable 71%. For a detailed look at February weather in Hanoi, you can visit Hanoi weather in February.
The weather in August and March presents a striking contrast in temperature and precipitation. August boasts scorching temperatures with a minimum of 24°C (76°F) and an average of 29°C (85°F), peaking at a sweltering 39°C (102°F). In addition, it is characterized by high humidity at 89% and significant rainfall, accumulating 378 mm (14.9 in) over 22 days. Conversely, March experiences much milder conditions, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 34°C (94°F) and an average of 22°C (73°F). Precipitation is considerably lower, with only 65 mm (2.5 in) across 14 days and humidity at 69%. For more about March conditions, refer to Hanoi weather in March.
In comparing the weather of August and April, one can notice significant differences in both temperature and precipitation. August boasts a much warmer climate, with temperatures averaging around 29°C (85°F) and highs reaching up to 39°C (102°F), while April presents a milder average temperature of 25°C (77°F) and peaks at 36°C (97°F). Additionally, August experiences a considerable amount of rainfall, with 378 mm (14.9 in) over 22 days, resulting in high humidity levels of 89%. In contrast, April is relatively drier, receiving only 147 mm (5.8 in) of precipitation over 14 days and maintaining a lower humidity level of 64%. For more detailed information, you can check Hanoi weather in April.
In comparing the weather of August and May, August tends to be hotter and more humid, with average temperatures around 29°C (85°F) and maximums reaching 39°C (102°F). This month sees a significant amount of rainfall, totaling 378 mm (14.9 in) over approximately 22 days, and an elevated humidity level of 89%. In contrast, May exhibits slightly cooler conditions, with an average temperature of 28°C (83°F) and a similar maximum of 39°C (103°F). Precipitation in May is lower at 188 mm (7.4 in) over 17 days, accompanied by a humidity level of 73%. For more detailed information, you can refer to Hanoi weather in May.
August and June have distinct weather profiles, with August featuring slightly cooler minimum and average temperatures, averaging 29°C (85°F) compared to June's higher average of 31°C (87°F). However, June boasts a maximum temperature of 40°C (105°F), which is marginally higher than August’s maximum of 39°C (102°F). Precipitation is significantly higher in August at 378 mm (14.9 in) over 22 days, while June sees less with 189 mm (7.4 in) over 15 days. Humidity levels are also elevated in August at 89%, compared to June’s 81%. For more details on June weather in Hanoi, visit Hanoi weather in June.
August and July share similar high temperatures, with August featuring a minimum temperature of 24°C and an average of 29°C, while July starts slightly warmer with a minimum of 25°C and an average of 30°C. Both months experience maximum temperatures peaking at 39°C. However, August is notably wetter, receiving 378 mm of precipitation over 22 days compared to July's 260 mm over 21 days. Humidity levels are quite close, with August at 89% and July slightly higher at 90%. For more detailed information about July's weather, you can check Hanoi weather in July.
August in Hanoi is characterized by higher temperatures, with a minimum of 24°C (76°F) and soaring maximums reaching up to 39°C (102°F). The month also sees significant rainfall, with 378 mm (14.9 in) over 22 days and a high humidity level of 89%. In contrast, September experiences slightly cooler weather, featuring a minimum temperature of 21°C (71°F) and a maximum of 37°C (99°F), along with reduced precipitation of 222 mm (8.7 in) across 21 days and lower humidity at 82%. As the city transitions from August to September, the weather becomes relatively more comfortable. For more details, visit Hanoi weather in September.
August weather in Hanoi typically presents a sweltering atmosphere, characterized by high temperatures averaging 29°C (85°F) and reaching up to 39°C (102°F). With 378 mm (14.9 in) of rainfall spread across 22 days, humidity levels soar to 89%, contributing to the sultry climate. In contrast, October brings a significant shift; temperatures drop to a more comfortable average of 25°C (78°F), with a maximum of 34°C (94°F). The month also sees reduced rainfall, totaling 279 mm (11.0 in) over 16 days and a lower humidity of 77%. This shift makes October a more pleasant time to visit compared to the heat and humidity of August. For more details, check out Hanoi weather in October.
August and November present contrasting weather patterns. In August, temperatures are considerably higher, with averages around 29°C (85°F) and a maximum reaching up to 39°C (102°F). This month is also characterized by significant rainfall, totaling 378 mm (14.9 in) across 22 days, and a high humidity level of 89%. In stark contrast, November brings much cooler temperatures, with an average of 22°C (73°F) and a maximum of 33°C (92°F). Precipitation decreases dramatically to 48 mm (1.9 in) over just 8 days, and the humidity drops to a more comfortable 72%. For more details on November weather, you can visit Hanoi weather in November.
In August, the weather is characterized by high temperatures, with a minimum of 24°C (76°F) and a scorching maximum of 39°C (102°F), making it one of the hottest months of the year. The humidity remains quite high at 89%, and the city experiences considerable rainfall, averaging 378 mm (14.9 in) over 22 days. In contrast, December sees much cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 31°C (87°F), signaling a significant drop in heat. Precipitation is minimal, with only 41 mm (1.6 in) falling over just 7 days, and the humidity decreases to 71%. For more details, you can check Hanoi weather in December.
As August settles in over Hanoi, the city experiences its warmest temperatures of the year, with daily highs reaching the steamy heights of 39°C (102°F). This month is marked by high humidity levels at 89%, making the heat feel even more intense. Unlike the drier months, August is characterized by frequent rain, with 22 days of precipitation contributing to a total of 378 mm (14.9 in). Such a damp climate creates a lush backdrop, but travelers should be prepared for sudden downpours that can disrupt outdoor plans. For more insights into weather patterns throughout the year, check out Hanoi Climate.