Weather in Hanoi in September
September in Hanoi is warm with average temperatures around 26.9°C (80.4°F). Expect significant rainfall with 223mm across approximately 18 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
30.4°C
86.7°F
Low
23.4°C
74.1°F
Precipitation
223 mm
8.8 inches
~18 rainy days
Conditions
Humidity
85%
Comparison to Adjacent Months
September is 99mm drier than August.
September is 2.8°C warmer than October, 99mm wetter than October.