Climate zone: tropics
High humidity in Vietnam and high temperatures are causing a pleasant weather at times, but also and partly tropical hot and humid. It is warm to hot all year round and invites to bathe at average water temperatures of 27 degrees. Because of the lower temperatures the best time for traveling is from December to February.Try to avoid the rainy season from July to October.
› Duration of daylight and sunshine in Vietnam
hours of sunshine per day rainy days per month Precipitation in mm/day Relative humidity in % Water temperature Absolute humidity in g/m³ (approx.)
Temperature records of the last 70 years
The hottest temperature measured from 1949 to December 2019 was reported by the Hanoi weather station. In June 2017 the record temperature of 42.5 °C was reported here. The hottest summer from July to September, based on all 17 weather stations in Vietnam below 680 metres altitude, was recorded in 1988 with an average temperature of 28.9 °C. This average temperature will normally be measured every 4 to 6 hours, thus also including the nights. Normally, this value is 28.0 degrees Celsius.
The coldest day in these 70 years was reported by the weather station Lang Son. Here the temperature dropped to 0.3 °C in January 2014. Lang Son lies at an altitude of 263 meters above sea level. The coldest winter (January to March) was in 1980 with an average temperature of 15.2 °C. In Vietnam, it is usual to have about 7.0 degrees more at 22.2 °C for this three-month period.
Long-term development of temperatures from 1998 - 2019
In contrast to single record values, a long-term development cannot simply be brought about by all weather stations in the country. Both the number and the locations are constantly changing. A simply calculated average value would give a falsified result. If several measuring stations in particularly cold mountain or coastal regions are added in one year, the average would already decrease as a result of this alone. If a station fails during the summer or winter months, it does not provide any values and falsifies the average again. The subsequent long-term development was therefore reduced to only 4 measuring points in order to have actually comparable data over as long a period as possible.
In the years 1998 to 2019 there were only these 4 weather stations in the whole country, which reported continuous temperature values (Haiphong, Vinh, Da Nang, Nha Trang). From these weather reports we have created a long-term development that shows the monthly average temperatures. The hottest month in this entire period was Juni 2019 with 31.1 °C. Februar 2008 was the coldest month with an average temperature of 17.5 °C.
The average annual temperature was about 25.3 °C in the years after 1998 and about 25.9 °C in the last years before 2019. It has therefore increased only slightly by about 0.6 °C over the past 22 years. This trend only applies to the selected 4 weather stations in Vietnam. A considerably more comprehensive evaluation of the global warming
has been provided separately.
More detailed information on global warming with a view by continent can also be found on our topic page on climate change