Temperatures plunged to minus 44.4 degrees Celsius in Otgon soum, an administrative subdivision of Zavkhan province in western Mongolia, during the overnight hours from Saturday to Sunday, the country's National Agency for Meteorology and Environmental Monitoring said Monday.

The Meteorological Department has issued a warning for cold weather, strong winds, and thunderstorms. A cold air mass from China has spread over upper Thailand and the upper southern region, causing temperatures to drop by 1–3°C, with strong winds expected.