Halong has basically two seasons the first being hot season accompanied with rain and the cold season which has chilly winds. The average temperature of the destination is 23.7 degree Celsius. The temperature rises to 34 degree Celsius and continues to be sunny, humid with rain for the next 6 months or so until it is taken over by the cold. The city receives much rain with the average precipitation being 1,832mm. Out of the total rainfall 80-85 percent rain happens in the hot season and makes the whole weather humid. It is one of the most humid cities in Vietnam with its annual humidity at 84 percent.
Summers (April to September): The average temperature in summer season is 34.9 degree Celsius. It also rains heavily in the summers and accounts for more than 85 percent of the whole rain.
Winters (October to March): The average temperature in summer season is 13 degree Celsius. For most of this season chilly winds are accompanied by the cold.
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