Weather in Thailand in September

September in Thailand is a hot month. Plan the serious walking for morning. The rest of the day wants shade and a slower pace.

A country pin in September is a warning: one region of Thailand will not match another. Use a city page if you already know where you are going. Compared with April and December, September sits in the middle of Thailand's year.

Average temp: 29°C
26–33°C

Rainfall: 331 mm
A wet month

Sunshine: 4.5 h
hours per day

What to expect

Daytime

Hot days in Thailand. Ruins, markets and hills are a morning job. Midday sightseeing is how people remember September for the wrong reason.

Nights stay warm. Air-con, if you can get it, is part of the brief. A jumper for September in Thailand is almost always a waste of bag space.

Rain

September is the wet side of the year in Thailand, the wettest stretch on these averages. Days can be heavy. Plans that cannot survive rain are the wrong plans.

This is not a reason to skip Thailand if you like the place. It is a reason to pack for weather and to stop treating every grey hour as a failed holiday.