An Giang is effected by two seasons of wind: The Southwest monsoon and the Northeast monsoon. The Southwest monsoon is cool and wet therefore it causing the rains. The Northeast monsoon blowing into An Giang starts from the tropical sea in the side of China so the temperature being higher than the ice and snow area of Siberia and the humidity being larger, without creating feature but only hot and dry, having its share of hot and dry sunlight.
The cloud amount is relatively low, so the temperate is often high. In rainy season, the amount of clouds is higher than in that in the dry season. The average cloud amount is 3.1 / 10 in the dry season and 6.9 / 10.N in the rainy season.
An Giang province has the highest number of sun hours in the year, gaining the record of the whole country. On an average, the dry season has10 hours of sunlight per day; though the rain season has fewer, it still comes up to 7 hours of sunlight/ a day. The total sunlight hours of the year comes over 2,400 hours.
The average temperature is very stable. The differential temperature between the months in the dry seasons is about 1.50C or 30C, and that in the months of the rain season is about 10C. The highest temperature is 35ºC – 37ºC from April to May and the lowest ones is 20ºC – 21ºC from December to January next year.
In the dry season, the main wind is the Northeastern wind and the Southwest wind is popular in the rain season. The speed of the wind is relatively strong, over 3m per second. The speed of the summer wind is stronger than the winter one. An Giang province is rarely influenced by storms.
In An Giang, the rainy season usually begins from May to the end of November. The total amount of rain of the rainy season accounts for 90% the total rainfall. The annual rainfall is 1.400 – 1.500mm.