Hanoi · Vietnam

September

Mid-Autumn Festival transforms the Old Quarter — Hang Ma Street with lanterns and mooncakes is unmissable.

Best match

#4 of 12 months

There are better months for Hanoi — see the full ranking below.

Climate

High

31°C

Low

25°C

Rain

258mm

Sun

5.5hrs/day

30-year climate normals · Open Meteo ERA5

How September scores in Hanoi

Weather

Average

Value

Very good

Crowds

Good

Events

Outstanding

Atmosphere

Outstanding

↑Mid-Autumn Festival (Tet Trung Thu) falls in September or October — Hang Ma Street becomes one of the most visually spectacular streets in Southeast Asia, densely packed with illuminated lanterns, mooncakes, and traditional masks; a genuine must-see event
↑The Old Quarter during the festival week is alive with children's processions, lion dances, and communal lantern lighting ceremonies around Hoan Kiem Lake — the atmosphere rivals Tet for emotional impact
↑Prices remain affordable as the rain keeps crowds lower than the festival deserves — a genuinely underrated time to visit Hanoi

↓258mm of rain means the Mid-Autumn Festival itself takes place in wet conditions; processions continue despite rain but the experience requires waterproof preparation
↓Still in the summer heat zone at 31°C and 83% humidity — daytime city walking between festival events is uncomfortable
↓The exact date of the festival moves with the lunar calendar; confirm dates before booking and ensure you are present for the key evening on the full moon

Climate data: 30-year normals (1991–2020) from Open Meteo ERA5 reanalysis. Scores compare months within Hanoi, not across destinations. Methodology →