Thailand has a tropical climate and as such you can always expect rain and sunshine – and sometimes within minutes of each other! Typically the wettest season is September and October, so you should make sure to have wet weather gear at this time of year. This being said, the rain is often in short sharp bursts and doesn’t stop you from doing anything on the project. As a guideline, you can expect:
Cold season: November – February. Temperatures approx 15 – 30 celsius.
Hot season: March – June. Temperatures approx30  45 celsius.
Rainy season: July – August. Temperatures approx25 – 35 celsius.
Wet season: September – October. Temperatures approx 25 – 35 celsius.