Why didn't the spaceship land in July and August?

High temperature and bad weather conditions.

1, high temperature impact: it is high temperature in July and August, and it is very hot in many areas. High temperature has a negative impact on astronauts and return cabin equipment, which increases the thermal stress and the challenge of thermal management.

2. Bad weather conditions: In July and August, during the rainstorm season in some areas, there are often bad weather conditions such as thunderstorms and strong winds, which bring risks to safe landing operations. Avoiding landing in the rainstorm season can reduce the risks.