Thailand has 3 seasons are Summer, Rainy Season and Winter.
Summer starts mid-February to mid-May. The temperature is between 35-40 Degree Celsius or about 95-104 Degree Fahrenheit.
Rainy Season starts mid-May to mid-October.
Winter starts mid-October to mid-February. The temperature by statistics is between 16-29 Degree Celsius or about 60.8-84.2 Degree Fahrenheit at the plain and the plateau has between 3-15 Degree Celsius or about 37.4-59 Degree Fahrenheit.
But In fact, the temperature is higher. It’s between 20-29 Degree Celsius or about 68-84.2 Degree Fahrenheit.
If you have a holidays plan in Thailand in the winter you should go to the northern or northern of the Northeast. There is good weather.
But if you need to have a vacation on the beach, scuba diving or any activities, the best period is until December to March.
In the rainy season, May to October should be abstained to go to Andaman Ocean site, such as Krabi, Phi-Phi islands, but you can go to the Thai Gulf site such as Koh Samet, Koh Tao, Koh Chang, Koh Kud, Ao NangYoun in May to August.
Check the weather…Click
Thai Meteorological Department
From August to September, you can go Koh Samui, Koh Tao, Koh NangYoun, Angthong islands National Park.
-Angthong islands National Park-
In October, not suitable to go to the sea. After that until November, Go Go Go!!! Let’s go to the sea again.