今年首场寒潮即将上线，降温日历看你家何时迎来最冷一天

Core Viewpoint - A significant cold wave is expected to hit China starting January 16, leading to a drastic temperature drop across many regions, reversing the recent warm weather experienced during the "Three Nine" period [1][3][6]. Temperature Changes - The first cold wave will bring temperatures down significantly, with some areas experiencing a drop of over 20°C. For instance, Zhengzhou's temperature is projected to fall from nearly 22°C on January 15 to -5°C by January 20, marking a cumulative drop of 26°C [6][7]. - Major cities like Yinchuan, Jinan, and Hohhot will also see substantial temperature declines, with drops around 20°C [6][7]. Timeline of Cold Wave Impact - The cold air will first affect the northwest and eastern regions, with the core temperature drop occurring from January 19 to 21, impacting most of central and eastern China [3][6]. - Specific dates indicate that on January 17, the cold wave will primarily affect northern Xinjiang and parts of Inner Mongolia, while by January 19, most of the central and eastern regions will experience noticeable cooling [3][6]. Weather Conditions - Alongside the temperature drop, regions will also face rain, snow, and strong winds, particularly in northern areas, which may lead to a wind chill effect. Southern regions will experience damp and cold conditions [7][8]. - The cold wave is expected to bring the lowest temperatures of the winter season, with cities like Beijing forecasted to have maximum temperatures below freezing for several consecutive days [6][7].