In October, southern Vietnam experiences hot but not scorching weather, while northern regions have transitioned into autumn, with milder and more pleasant climate. Additionally, this period marks the end of the rainy season, with an obvious decrease in precipitation across the country. These factors collectively create favorable conditions for traveling in Vietnam.

Temperature

As October arrives, the temperature in Vietnam gradually drops, and it is more obvious in the north than in the south, causing the temperature difference between the two regions.

In southern regions like Ho Chi Minh City, despite a slight decrease in temperature, the climate continues to exhibit typical summer characteristics: daytime highs range from 30 to 34 degrees Celsius (86 to 93 degrees Fahrenheit), while nighttime lows fall between 23 and 26℃ (73 to 79 ℉). Even a one or two-hour city walk at noon can leave you drenched in sweat; but the evenings are quite cool, making it perfect for leisurely strolls through night markets and enjoying local street cuisine.

Saigon at Noon

The temperature in the north drops significantly, showing the coolness of autumn. For instance, in Hanoi, the high temperature is mostly between 30 and 33℃ (86 to 91℉), and by the end of the month, it drops to 25 to 28℃, while the low temperature remains stable at 22 to 26℃. The sun no longer burns harshly; gentle sunlight accompanied by a light breeze makes ambling along the streets and alleys an especially comfortable experience.

Precipitation

Average precipitation: 338 mm from 17 rainy days

The overall rainfall in Vietnam in October shows a downward trend, but regional differences are quite significant.

Although southern Vietnam has witnessed a trend of reduced rainfall due to the weakening of the southwest monsoon, the decline in precipitation has been relatively modest because of the regulation of the marine climate and the high air humidity. In Ho Chi Minh City, for instance, the rainfall in October amounts to 267mm, and the number of rainy days is 21. Most of the rain is sudden and intense. It might be sunny in the morning; however, in the afternoon, raindrops suddenly pour down fiercely, making it hard to see the road clearly. Fortunately, such rain usually does not persist for more than an hour. You can quickly take shelter in a nearby store, do some shopping, chat for a while, and then continue your tour in no time.

Saigon Old Street After the Shower

Looking at northern Vietnam, the southwest monsoon has completely subsided, leading to a substantial decrease in rainfall. For example, in Hanoi, the rainfall in October drops to 131 mm on average, and the number of rainy days also declines to 9. Most of the time, the sun shines brightly. You can wander at your own pace without worrying about the rain disrupting your steps.

Typhoon

October is still in typhoon season. When landing, it often brings extreme heavy rainfall, especially to northern and central Vietnam. For instance, when Typhoon Matmo passed through in October 2025, Hanoi recorded daily rainfall exceeding 200mm. The city was once turned into a “water city”, with severe road flooding and total traffic paralysis. Therefore, it is essential to pay attention to typhoon warnings before traveling and avoid the period affected by typhoons.