Weather in Chiang Mai
Chiang Mai has a tropical climate, but is cooler and less humid
than elsewhere in Thailand. Chaing Mai experiences monsoons. The
south-west monsoon arrives from India at the end of May and lasts
until November, with the heaviest downpours in August/September.
Rain usually occurs in the late afternoon. Between November and May
cool air blows in from China and northern Vietnam, bringing a dry
season with mild days and balmy nights. Temperatures are at their
lowest in December/January, and it is chilly enough to require a
warm jacket at night.