Hanoi Weather in September – Average Temperature and Rainfall
- High
- 30.8°
- Low
- 24.8°
- Rainfall
- 352 mm
- Rainy season
- 21d
- max
- 34.7°
- min
- 20.5°
September
- Early
- 31.3° 109.4 mm
- Mid
- 30.9° 116.4 mm
- Late
- 30.3° 126.1 mm
Summary
The climate figures for Hanoi are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 2,203 mm.
The rainy season runs April–October. The wettest month is August with 432.9 mm across 25 rain days; the driest is December at just 33.8 mm.
The hottest month is June (average high 33.2°C) and the coolest is January (21°C).
The most comfortable time to visit Hanoi is December — less rain and milder heat.
Monthly averages
Common questions
Will it rain in Hanoi today?
No. The chance of rain today is only about 0%.
How hot is it in Hanoi today?
Between 23°C and 32°C, with a felt maximum of 38°C.
What is the weather in Hanoi tomorrow?
Tomorrow: light drizzle, 24–32°C, with a 37% chance of rain.