Ha long Bay Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Ha long Bay, An Giang, Vietnam. This average is based on long-term data collected between 1990 and 2020. Let's now guide you through the details for a complete overview.
Ha long Bay has a notably wet climate with abundant precipitation, recording 2090 mm (82 in) of rainfall per year. It does, however, have a distinct rainy season during certain months. Have a look at our detailed charts below to see how precipitation varies throughout the year.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Significant seasonal changes in precipitation occur throughout the year. During the wettest month, August receives substantial rainfall, averaging 430 mm (17 in) of precipitation, recorded across 16 rainy days.
In contrast, the driest month, February brings less rainfall, with 51 mm (2 in) over 11 rainy days.August, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 175 hours of sunshine in this period. During the driest month February you can expect a temperature of 20°C (68°F). For more detailed insights into the city's temperatures, visit our Ha long Bay Temperature page.
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
Explore Ha long Bay's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Ha long Bay spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Vietnam: City Comparison
The map below shows the annual precipitation across Vietnam. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Ha long Bay vs World: Rainfall Compared
Ha long Bay's average annual precipitation is 2090 mm (82 in). Let's compare this to some popular worldwide tourist destinations:
New York City, USA, receives 1276 mm (50 in) of rainfall annually, with precipitation evenly distributed throughout the year.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.
Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Tropical Rainforests: In tropical regions, rainfall is generally abundant year-round. Areas near the equator, like the Amazon rainforest, can receive up to 3000 mm (118 in) of rain annually.
Desert Regions: Deserts such as the Sahara and Arabian deserts typically see less than 250 mm (9.8 in) of rainfall annually. Rainfall tends to be infrequent, but when it does occur, it is often intense.
Temperate Zones: In temperate regions, precipitation tends to be more evenly distributed, though areas closer to the ocean may see more rain in the winter months, and areas further inland experience drier summers.
Polar Regions: Precipitation in polar regions, like Antarctica, is extremely low, often falling as snow. Average annual precipitation in Antarctica is less than 200 mm (7.9 in), with some areas receiving as little as 50 mm (2 in) annually.
- Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
- In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
- Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.
For more detailed information about Ha long Bay's weather, including sunshine hours, humidity levels, and temperature data, visit our Ha long Bay Climate page.
