Climate

​

Seasons in Thailand

​

Thailand's climate is tropical, with an average yearly temperature of 27°C. The three seasons are:

​

- Winter, from October to February, dry, and lowest yearly temperatures: lowest and highest daily average: 21 to 32°C.

​

- Summer, from February to May, with highest temperatures, daily minimum and maximum averages: 25 to 34°C.

​

- Moonsoon season, from May to October, very wet especially in August and September, and some dry weeks within June-July. Temperatures are mild, lowest and highest daily average: 25 to 31°C.

​

Cloud cover

​

The figure below shows monthly average cloud cover over a 10-year period (2006-2015). On the scale, 0 represents clear sky and 10 is completely overcast. Full paper reference below.

Astronomy season

From my experience in Bangkok, good observations can be made from November to May, with best skies between January and March. Click here for actual sky condition and seeing.