Pai’s northern mountain climate has a clear best season.
Cool season (Nov–Feb) — best
Misty mornings and clear days — the classic Pai experience, and the busiest.
Burning season (Mar–Apr) — avoid
Air quality can drop sharply with regional burning.
Green season (Jun–Oct)
Lush, quiet and cheaper, with passing rain and full waterfalls.
See also: the full Pai travel guide.