These are notes on Vietnam weather in September 2026 and what to know before planning travel holidays to Vietnam in 2026, be it your family trip or your travelers’ Vietnam tours if you are a tour company or travel agency.
General Weather Patterns in Vietnam in September
September is autumn in northern Vietnam with more likely sunny weather, with rain occasionally, and with pleasant temperatures (34-38oC).
September is the beginning of rainy season with pleasant temperatures in the Central Coast of Vietnam. This region is to experience mostly clouds and rain, some sun, and with warm or pleasant temperatures. Depending on a specific year, it may rain more or less, but the rain should not affect your visits to key tourist attractions much; this is not applicable if you visit mountains or take on adventures in the western mountains.
September is the high rainy season in the Central Highlands and southern Vietnam. The temperatures in the Central Highlands are 19-31oC and those in southern Vietnam are 25-32/33 oC.
The prevalent winds in Vietnam in September are
- The Southeasterly Monsoon which blow mostly in northern Vietnam which causes moist air and pleasant temperatures.
- The Westerly Wind, which comes from the Equator and which is a foehn wind after blowing through the Myanmar, Thailand, Laos before hitting part of the Central Coast (Thanh Hoa, Nghe An, Ha Tinh, Quang Binh, Hue), causes clear skies, dry air and hot temperatures. This wind is a regional version of the Southwesterly Monsoon. This wind is often not the dominant factor impacting the Central Coast in September.
- The Southwesterly Wind, which comes from the Equator, causes daily rain in the Central Highlands and in southern Vietnam. This wind helps to bring pleasant temperatures in southern Vietnam and in the places on low altitudes of the Central Highlands, cool temperatures in the places on high altitudes.
Possible Dangers From Extreme Weather:
Weather-related dangers in Vietnam in September may include:
- Flash floods, landslides, rockslides in the far northern mountains of Vietnam;
- Flash floods in the Central Highlands;
- Strong current of open sewer systems in cities in the Central Highlands and in southern Vietnam (especially in Dong Nai and Binh Duong Provinces);
- Leakage current in flooded streets in all over Vietnam after heavy rain.
If there were risks from weather conditions, they should to be updated in the list below.
1/ Northern Vietnam
2/ Central Highlands and Central Coast of Vietnam
3/ Southern Vietnam
Vietnam Weather: First 10 Days of September 2026
Vietnam Weather: Second 10 Days of September 2026
Vietnam Weather: Last 10 Days of September 2026
Disclaimer: Vietnam weather summary is for reviews of Vietnam weather by month on the basis as “it is” to the best of our knowledge. TravelNewsNow does not guarantee the accuracy of our monthly reviews of Vietnam Weather. Our Vietnam Weather Reviews by month must not be used for making travel decisions or for any other purposes. TravelNewsNow disclaims any liability in connection with with the use of our information.
