The Rainy Season (June to October)
The rainy season which typically runs from June to October isn’t anything like as bad as it sounds, and it’s actually a surprisingly good time to visit Chiang Mai.
Temperature during the rainy season cools down although the air humidity is high (30-65%). This wet weather is caused by the south-west monsoon, arrives from India in the late of May. With the monsoon rains, the sky gets cleaner as all the smoke and dust is washed out and blown away.
Rainy season does not necessarily mean it rains all day. Rainfall is mostly in the afternoon or at night, and it often comes as quick, short blast of a tropical downpour. Very rarely you have a few days when it rains continuously.
When they do, they don’t often last for very long and it gets dry afterward rather quickly lasting an hour or two, rarely severe or prolonged enough to interfere with travel. If you’re prepared with an umbrella and some waterproof clothing, you can actually have a very good time exploring.
Sometimes it does rain heavier and more constant, especially as the monsoons reaching their peak in August and September. It’s a good time to seek shelter in a cafe, museum or spa.However, it is also normal to have several sunny days in a row with completely no rain.
