Group 1 - The "Sanfu" period this year lasts for 30 days, from July 20 to August 18, which is the shortest in the last decade [3][6] - The "Sanfu" is divided into three parts: the initial phase (July 20-29), the middle phase (July 30-August 8), and the final phase (August 9-18) [3][4] - The duration of "Sanfu" can vary between 30 and 40 days depending on the number of "Geng" days between the summer solstice and the beginning of autumn [4][6] Group 2 - Historically, from 1951 to 2050, there are 71 years with a 40-day "Sanfu" and 29 years with a 30-day duration [6] - The "Sanfu" period is characterized by high temperatures and humidity, often referred to as "muggy heat" [7][9] - The "Sanfu" period typically includes the hottest solar terms of the year, such as "Minor Heat," "Major Heat," and "Beginning of Autumn" [9]
迎接近10年来“最短”三伏天 这些知识你知道吗？
Yang Shi Wang·2025-07-19 16:55