Hanoi weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Poor
Best time to visit: November – March
What is the weather like in Hanoi in May?
In May, Hanoi is hot: daytime highs average 31 °C, and even at night it stays warm at around 24 °C. Expect around 5 hours of sunshine a day. It rains often – on about 17 days, adding up to 233 mm. On about 21 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is not an ideal month for a holiday in Hanoi.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 13 h 7 min05:19 – 18:26
- UV index
- 12 · extremeclear sky, noon (estimate)
- Muggy days
- 30 daysdew point 18 °C or more
- Wind
- 13 km/haverage daily peak
- Cloud cover
- 75 %on average
- Hot days
- 21 days30 °C or more
- Time zone
- UTC+7Asia/Bangkok
How the score comes together
- Temperatureweight 50 %49 %
- Sunshineweight 20 %33 %
- Few rainy daysweight 30 %5 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in May
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Hanoi in May: quick answers
Is Hanoi hot in May?
Yes. In May, Hanoi is hot: daytime highs average 31 °C and nights stay around 24 °C. On about 21 days the thermometer climbs to 30 °C or more.
Does it rain much in Hanoi in May?
It rains often – on about 17 days, adding up to 233 mm.
Hanoi month by month
The whole year in HanoiAll destinations: Vietnam
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)