At around 5 a.m. Wednesday it began to snow on the 3,143-meter mountain.
Fansipan is famous for its trekking tours and its peak houses a complex of Buddhist pagodas and temples.
The temperature this morning in Sa Pa was measured at zero degrees Celsius and it has sometimes plunged to minus 5 degrees.
Luu Minh Hai, former director of the Lao Cai Provincial Hydro-meteorological Station, said snowfall would continue for the next few days.
A bronze Buddha statue at the top on Mount Fansipan that appears magical amid the snow.
Installed in 2015, the statue is 21.5 meters tall and its pedestal is decorated with a dragon and flowers.
Mai Quang Thien, an employee of Sun World Fansipan Legend tourist complex, said: "Snow fell from early morning to 8:40 a.m. There is light rain on Fansipan and the snow is starting to melt."
Snow blankets Kim Son Bao Thang Tu Temple situated at an altitude of 3,100 m and five minutes on foot to the top of Fansipan.
Snow covers Mount Fansipan in Sa Pa on December 28, 2022.