Doi Inthanon is the highest mountain in Thailand. It is in Chom Thong District, Chiang Mai Province. This mountain is an ultra prominent peak, known in the past as Doi Luang or Doi Ang Ka, meaning the ‘crow’s pond top’. Tired of the heat, come here for a nice cool down….. The climate is typically tropical and fairly cool on the summit of Doi Inthanon. In winter the average temperature is 6 °C (43 °F) in January and temperatures can sometimes drop below 0 °C (32 °F). On 21 December 2017, an all-time low temperature of minus-5 °C was recorded at 06:30 at km 44.4. From March to June, temperatures are pleasant especially at higher altitudes. The rainy season runs from April to November, when it sometimes rains more than two hours per day.