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The Climate of Vietnam

               Vietnam is located between 9 and 23 degrees north. Eastern Vietnam has a long coastline on the Gulf of Tonkin and the South China Sea. It has a tropical monsoon type of climate; from May-Sep the south monsoon sets in, and the country is dominated by south to southeasterly winds. From Oct-April, the north monsoon is dominant with northerly to northeasterly winds affecting the country. There is a transition period between each monsoon season when winds are light and variable.

               The country is mountainous in the northwest and in the central highlands facing the South China Sea, with peaks reaching up to 8000ft (2450m) In the north around Hanoi and in the south around Ho Chi Minh City, there are extensive low-lying regions in the Red River delta and the Mekong delta respectively.

               Vietnam has a single rainy season during the south monsoon (May-Sep). Rainfall is infrequent and light during the remainder of the year. Rainfall is abundant, with annual rainfall exceeding 1000mm almost everywhere. Annual rainfall is even higher in the hills, especially those facing the sea, in the range of 2000-2500mm.

               For coastal areas and the parts of the central highlands facing northeast, the season of maximum rainfall is during the south monsoon, from Sep-Jan. These regions receive torrential rain from typhoons which move in from the South China Sea at this time of the year. The weather at this time is cloudy with frequent drizzle.

               During the north monsoon, northern Vietnam has cloudy days with occasional light rain, while southern Vietnam tends to be dry and sunny.

               Temperatures are high all year round for southern and central Vietnam; but northern Vietnam has a definite cooler season as the north monsoon occasionally advects cold air in from China. Frost and some snow may occur on the highest mountains in the north for a few days a year. In the southern Vietnam, the lowlands are sheltered from outbreaks of colder northerly air and the dry season is warm to hot with much sunshine.



 

Hanoi

Month Rainfall (mm)

Temperature (Celsius)

Average monthly Ave no of days with 1mm

Average daily

Lowest recorded Highest recorded
min max
Jan 19 8 12 20 6 33
Feb 27 13 13 21 7 35
Mar 39 14 18 24 11 37
Apr 80 15 21 29 10 38
May 198 16 22 32 15 42
Jun 240 14 25 33 20 39
Jul 322 16 26 32 23 40
Aug 345 17 25 32 21 39
Sep 250 13 24 31 18 37
Oct 99 9 23 28 14 37
Nov 44 8 19 25 8 36
Dec 21 7 16 21 7 37
 

Ho Chi Minh

Month Rainfall (mm)

Temperature (Celsius)

Average monthly Ave no of days with 1mm

Average daily

Lowest recorded Highest recorded
min max
Jan 14 3 21 32 13 37
Feb 4 2 22 33 15 38
Mar 12 2 23 34 19 39
Apr 42 5 24 34 20 40
May 220 15 25 33 21 39
Jun 331 22 24 32 22 38
Jul 313 23 25 31 20 35
Aug 267 20 24 32 19 34
Sep 334 21 23 31 21 35
Oct 268 20 23 31 20 34
Nov 115 12 22 30 18 35
Dec 56 8 22 31 15 36

 


Copyright 2007 The Embassy of the Socialist Republic of Vietnam in the United Kingdom.