Hanoi Weather in September
31°C high · 24.3°C low · 246 mm rain · 7.5h sun
Sep is a warm month in Hanoi — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 31°C |
| Average low | 24.3°C |
| Rainfall | 246 mm |
| Sunshine | 7.5 hours/day |
| Daylight | 12.1 hours |
What to pack in September
Pack light, breathable clothes, plus a raincoat and umbrella for Hanoi in September.
Hanoi weather by month
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Frequently asked questions
What is the weather in Hanoi in September?
Highs of 31°C and lows of 24.3°C, with about 246 mm of rain and 7.5 hours of sunshine per day.
Is September a good time to visit Hanoi?
Sep is a warm month in Hanoi — not peak season, but a good time to avoid crowds.
What to do in Hanoi · Best time to visit Hanoi
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.