Ha Long Weather in May
May in Ha Long sees daytime temperatures around 30°C (86°F) and lows of 25°C (77°F) at night. Being part of the rainy season, heavy rainfall is a regular part of the day, so pack accordingly.
Rainfall in Ha Long in May
As part of the rainy season, Ha Long sees around 14 days of rain in May, with an average of 216 mm (8.5 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Ha Long in May
Daytime highs in Ha Long in May reach 30°C (86°F), with nights around 25°C (77°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Ha Long in May
With approximately 190 hours of sunshine, the days are filled with clear skies during the day. Rain typically falls in the afternoon or evening, keeping mornings and early parts of the day sunny.May in Ha Long can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Ha Long's climate page.
Ha Long Temperature in May
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Chance of Rain
46%
Precipitation
216 mm (8.5 in)
Rainy days
14 days
Humidity
84%
Sunshine
190 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ha Long typically stay consistent throughout May, with daily highs averaging around 30°C (86°F). Nights are warm, with lows typically ranging from 23°C (73°F) to 26°C (79°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Ha Long in May
Browse day-by-day weather records for Ha Long spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ha Long historical weather extremes in May
The extremes listed below come from historical weather data collected in Ha Long from 1994 through 2025.
- The hottest May day on record in Ha Long reached 40°C (104°F) (May 21, 1998).
- On May 5, 2004, Ha Long saw its coldest May day with temperatures maxing out at 20°C (68°F).
- Nighttime temperatures dropped to 17°C (63°F) on May 5, 1994, marking the coldest May night on record.
Best Places in Vietnam in May
Find out more about the weather in Vietnam and which places have the best travel conditions in this month. See all of Vietnam in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Ha Long in May
Warm temperatures in May make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Ha Long in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Ha Long's climate page.
Temperature Rainfall Sunshine Humidity
See the full Ha Long climate overview or explore weather in Vietnam.
