Hanoi · Month comparison
September vs April
April ranks #1 overall vs September at #4. The best weather month — warm, sunny, low crowds, and the Old Quarter at its most photogenic.
September
#4 of 12 months
Best match
Mid-Autumn Festival transforms the Old Quarter — Hang Ma Street with lanterns and mooncakes is unmissable.
- ↑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
April
#1 of 12 months
Best match
The best weather month — warm, sunny, low crowds, and the Old Quarter at its most photogenic.
- ↑April is the joint-best weather month in Hanoi: 26°C, 5.5 sunshine hours, and light rather than heavy rain — the Old Quarter is comfortable to explore for a full day without the humidity and heat of summer
- ↑Crowds are at their annual low outside the peak seasons; the Ngoc Son Temple at Hoan Kiem Lake and the Temple of Literature can be visited without congestion
| Factor | September | April |
|---|---|---|
| Weather score | 4 | 8 |
| Value score | 7 | 7 |
| Crowd score | 6 | 7 |
| Events score | 9 | 5 |
| Atmosphere | 9 | 7 |
| Avg high temp | 31°C | 26°C |
| Monthly rain | 258mm | 88mm |
| Daily sunshine | 5.5hrs | 5.5hrs |
September trade-offs
- ↓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
April trade-offs
- ↓Rainfall increases to 88mm — light but present; afternoon showers are possible; carry a small umbrella or poncho
- ↓April is starting to become more popular as word of the good weather spreads; hotels fill faster than in February-March and prices begin edging upward
- ↓The heat is building toward summer levels by late April — daytime sightseeing between 11am and 3pm can already feel warm
Scores compare months within Hanoi. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →