Kritsayam Kongsatree, chief of the Doi Inthanon National Park, said the tourists visited the mountaintop to enjoy the first sunlight of the day, even although there was no frost on Saturday morning.
He said the number of visitors could grow past the 10,000 mark before the end of the day. The park expects over 10,000 visitors each day of the long New Year weekend, he added.
He said the temperature on the mountaintop was measured at 6 degrees Celsius on Saturday morning and 9C at the Kiew Mae Pan viewpoint.