Chiang Rai is characterized by a tropical wet and dry climate with warm winters and slightly warmer summers. Rainfall experienced is seasonal but the temperature variations are not too major. Average annual temperature is around 24 – 25 degree Celsius.
The best time to visit Chiang Rai is during the cooler winter months which are almost rainless. This ensures that the weather is not very humid and it is easy to go outdoors for sightseeing. The rainy season is an off season and a visit should be avoided in those months.