Cool
Average highs are around 20°C, so pack for cooler days.
January verdict
Mixed for holiday weather
Average highs are around 20°C, so pack for cooler days. Sunshine averages 2.5h per day, so this is not one of the brighter months. Rainfall averages 21mm, which is relatively low for holiday planning.
Monthly averages
Temp
20°C
Rain
21mm
Sun
2.5h
Weather score
49
Mixed
Cool
Average highs are around 20°C, so pack for cooler days.
Drier
Rainfall averages 21mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 2.5h per day, so this is not one of the brighter months.
Map
Compare Hanoi, Vietnam with nearby places by weather score, rain, sun, temperature, and swim conditions.
January20°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
January21mm average rain
January is one of Hanoi's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to April and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
January2.5 hours average sun
January is one of Hanoi's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsMay to October
This stretch has the strongest sunshine in the monthly averages.
January49 weather score
January sits close to Hanoi's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsApril and October to December
These months have the strongest weather score in the monthly averages.