Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
September verdict
Lang Son, Vietnam in September
Weather score58Good
Good for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 5.9h per day, enough for a balanced month. Rainfall averages 166mm, so some wet days are possible.
September weather
Monthly averages
Temp
30°C
Rain
166mm
Sun
5.9h
Weather score
58
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 166mm, so some wet days are possible.
Some sun
Sunshine averages 5.9h per day, enough for a balanced month.
Map
Weather map
Compare Lang Son, Vietnam with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September30°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
September166mm average rain
September sits near Lang Son's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and October 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 brighter than Lang Son's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to September
This stretch has the strongest sunshine in the monthly averages.
Weather score
September58 weather score
September sits close to Lang Son's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsApril and October to November
These months have the strongest weather score in the monthly averages.
