北京未来三天以晴为主，气温回升，适宜户外活动

Summary - The article provides a weather forecast for Beijing, indicating clear weather conditions with temperature fluctuations and wind changes over the next few days [1][2] Group 1: Weather Conditions - The evening to night forecast predicts clear skies with winds shifting from south to north at levels 2 to 4, and gusts in mountainous areas reaching levels 6 to 7 [1] - The minimum temperature is expected to drop to -1°C tonight, while tomorrow's daytime forecast shows clear skies with winds shifting from north to south at levels 2 to 3, and gusts around level 5 [1] - Over the next three days, the weather will primarily be clear with rising temperatures, making it suitable for outdoor activities [1] Group 2: Health Advisory - The article advises caution regarding low temperatures in the early morning and evening, recommending measures for warmth to prevent colds and cardiovascular diseases [1]