As for the weather seasons, there is a pattern repeated throughout the north, that is, the same for Chiang Rai in the east and Mae Hong Son in the west.
The monsoons begin in May and end in October, a period in which nature and the rice fields are exuberant, although then it is necessary to adapt to a higher probability of rain.
From November to mid-February, it’s the ideal time to go north. In December and January, the temperatures drop, the nights are cool and even cold as you gain altitude during the excursions.
From mid-February to mid-May, the forest is drier and the atmosphere less clean. Cultural visits and the hill tribes should get your attention.