Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
September verdict
Hanoi, Vietnam in September
Weather score47Mixed
Mixed for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 5.9h per day, enough for a balanced month. Rainfall averages 228mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
31°C
Rain
228mm
Sun
5.9h
Weather score
47
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 228mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.9h per day, enough for a balanced month.
Map
Weather map
Compare Hanoi, Vietnam with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September31°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
September228mm average rain
September is wetter than Hanoi's yearly average, so flexible plans matter more.
Driest monthsJanuary to April and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.9 hours average sun
September is one of Hanoi's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to October
This stretch has the strongest sunshine in the monthly averages.
Weather score
September47 weather score
September scores below Hanoi's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsApril and October to December
These months have the strongest weather score in the monthly averages.
