The weather in Vietnam in September is very hot. The average temperatures are between 25°C and 31°C, drinking water regularly is advisable.
With more than 22 rainy days, Vietnam is an incredibly wet during September. Be sure to pack your umbrella and bring along your rubber boots to stay dry. It’s going to be raining cats and dogs this month!
Our weather forecast can give you a great sense of what weather to expect in Vietnam in September 2025.
If you’re planning to visit Vietnam in the near future, we highly recommend that you review the 14 day weather forecast for Vietnam before you arrive.
Temperatures
31° / 25°
Rainy Days
30
Snowy Days
0
Dry Days
0
Rainfall
420
mm
Sun Hours
10.5
Hrs