冷空气退场！今起至下周，北京气温回升

Group 1 - The weather in Beijing is expected to be clear to partly cloudy, with temperatures gradually rising after a period of cold air [1] - The highest daytime temperature is projected to reach around 12°C by January 13, with nighttime temperatures also increasing [1] - The dry air conditions persist, and residents are advised to stay hydrated [1] Group 2 - The current period coincides with a peak time for purchasing goods for the upcoming New Year, making the weather conditions suitable for shopping [2]