Hanoi Weather in September
Vietnam · 30-year monthly averages
⚠️ Challenging time to visit
September in Hanoi is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 24°C (75°F). Expect roughly 222mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
Avg high
30°C
87°F
Avg low
24°C
75°F
Rainfall
222mm
very wet
Mean temp
28°C
82°F
🎒 What to pack
- breathable summer clothing
- sunscreen, hat and sunglasses
- refillable water bottle
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is Hanoi in September?
- September in Hanoi is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 24°C (75°F). Expect roughly 222mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
- Does it rain a lot in Hanoi in September?
- Hanoi sees around 222mm of precipitation in September on average — very wet by global standards.
- Is September a good time to visit Hanoi?
- September is a challenging month to visit Hanoi weather-wise — plan around the conditions.