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Climate in the Mekong Delta
(Vietnam)

Average daytime and nighttime temperatures


All climatic diagrams on this site result from the collected data from 3 measuring stations in Mekong Delta.
All data correspond to the average monthly values of the last 20 years.


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The Mekong Delta is one of the warmest region in Vietnam with an average daily high temperature of 32 degrees centigrade. High humidity and hot temperatures make the weather at times pleasant but also tropical humid. It is warm to hot all year round and invites to bathe at average water temperatures of 29 degrees. Dued to the lesser rain the best time for traveling is from December to April. Most precipitation decrease from June to October.
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Hours of sunshine per daySunshine hours per day in the Mekong Delta
The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 9 hours per day, March is the sunniest month in the region of Mekong Delta. In September the sun shines the shortest.
Rainy days per monthRainy days per month in the Mekong Delta
A rainy day is a day on which at least an amount of 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 21 rainy days, September offers the most number of rainy days, and in February the least.
Precipitation in mm/dayPrecipitation in the Mekong Delta
The amount of precipitation is measured in millimeters per square meter. Thus, at 2 mm/day, 2 liters of water fall on one square meter within 24 hours. With only 0.57 mm, the least rain falls in February. September, on the other hand, has the most rain.
Water temperatureWater temperatures in the Mekong Delta
Water temperature depends not only on solar radiation within the same region, but also on ocean currents. For example, depending on the season, cold or warm water masses are moved from other areas. The warmest temperatures in the Mekong Delta are in July, when the water is 30 °C.
Relative humidity in %Relative humidity in the Mekong Delta
Warm air can absorb more moisture than cold air. The relative humidity indicates how much moisture of the physically possible is actually contained in the air. At high humidity, the person feels uncomfortable and perceives this as oppressive. In general, a relative humidity of 40-60% gives as pleasant. With humidity averaging 83%, September is the most uncomfortable. In February, on the other hand, it is easier to endure.
Absolute humidity in g/m³Absolute humidity in the Mekong Delta
In warm months, there is also a higher absolute humidity almost everywhere. At a temperature of 25°C, air can absorb up to 23 grams of water per cubic meter. At 20°C, it is only 17.3 grams. A relative humidity of 40% at 25°C thus corresponds to an absolute humidity of 9.2 grams of water. From a proportion of approx. 13.5 grams, humans perceive the air as muggy. This limit is exceeded throughout the year in the Mekong Delta.
Humidex in °CHumidex in the Mekong Delta
The "Humidex" (humidity index) is an index of well-being in warmer areas, calculated from the air temperature, relative humidity and dew point. The index corresponds approximately to the temperature felt. At high temperatures, the body transports heat away by sweating. At high humidity the ambient air can only absorb a small amount of sweat and thus one feels uncomfortable. An index of 20-29 is considered comfortable. Up to 39, people perceive the air as slightly uncomfortable, and above 40, as very uncomfortable. Values above 45 are dangerous in the long run and often lead to heat stroke.
Map of Mekong Delta

Most important cities in the region »Mekong Delta«

Alone 9 cities with over 100,000 inhabitants are located here. The region has a west-east extension of about 300 km and over 170 km from north to south.

CityPopulationGeo-Position
Can Tho259,59810° 2' 14"N105° 47' 18"E
Rach Gia228,35610° 0' 45"N105° 4' 51"E
Long Xuyên158,15310° 23' 11"N105° 26' 7"E
Can Giuoc152,20010° 36' 31"N106° 40' 17"E
My Tho122,31010° 21' 36"N106° 21' 36"E
Soc Trang114,4539° 35' 60"N105° 58' 19"E
Cà Mau111,8949° 10' 37"N105° 9' 9"E
Thanh pho Bac Lieu107,9119° 17' 39"N105° 43' 40"E
Vinh Long103,31410° 15' 13"N105° 58' 20"E
Cho Dok70,23910° 41' 60"N105° 7' 0"E
Tân An64,80110° 32' 9"N106° 24' 49"E
Cao Lãnh63,77010° 27' 37"N105° 37' 59"E
Sadek60,07310° 17' 27"N105° 45' 23"E
Ben Tre59,44210° 14' 29"N106° 22' 33"E
Trà Vinh57,4089° 56' 50"N106° 20' 32"E
Hà Tiên40,00010° 22' 59"N104° 29' 15"E
Vi Thanh24,4779° 47' 4"N105° 28' 12"E
Duong GJong15,00010° 13' 2"N103° 57' 33"E
Ap Tan Ngai8,88710° 13' 60"N106° 16' 60"E


Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants: geonames.org, United Nations Statistics Division and own research.
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