Why is the 29th Summer Olympic Games held in Beijing in July and August (considering climate conditions) instead of September and October? Isn't it raining a lot in July and August

Why is the 29th Summer Olympic Games held in Beijing in July and August (considering climate conditions) instead of September and October? Isn't it raining a lot in July and August

Beijing is in the temperate zone, belonging to the temperate monsoon climate. It is hot and rainy in summer, cold and dry in winter. Although there is much precipitation in summer in July and August, the sandstorm in September and October is very serious. Due to the increasing influence of the winter monsoon, the bad weather is increasingly prominent, such as sandstorm, cold wave and so on
Although there is a lot of precipitation in July and August, it can purify the air and increase the humidity, which is conducive to the competition