Due to its size, Vietnam weather has a number of climate zones that are distinctly different from each other. The three main climate zones are separated into the north, the south and the central regions of the country. The north features four distinct seasons with rather cool winters that experience temperatures as low as 15°C, particularly in Hanoi. The north Vietnam weather during summer and spring is quite pleasant although summer is much warmer and wetter than spring from March to April and autumn from October to December. However, the Highlands experience much more conditions sometimes receiving snow in winter and with summer temperatures peaking at 40°C.
The south Vietnam weather really only experiences three seasons with hot and dry conditions from March to late May or early June, a wet season from late June or early July to November and cooler dry conditions from December to February. April is generally the hottest time of year with maximum temperatures around 33°C - 35°C most days. During the wet season, almost every afternoon will see a downpour occur and occasionally streets will flood however these brief showers help to cool the hot and humid conditions. From December to February, temperatures are quite mild with evenings cooling to about 20°C, making this the nicest time of year weather-wise.
Central Vietnam is actually divided into different weather patterns of the north and south which is separated by the Hai Van pass. Langco marks the beginning of the hot summers and cool winters of the north while Danang begins the pleasant and mild conditions of the south. From September to February, Central Vietnam experiences the northeast monsoon which brings heavy rain, strong winds and large swells. Tourists wanting to travel though Central Vietnam should avoid the area at this time of year as conditions are unpleasant and can make getting through the region far more difficult.