1. Generally speaking, it is auspicious to choose a clear and cloudless day to hold important activities. If it rains or is cloudy, it may have some impact on the progress of Gai Lou.
2. If it rains on the day when the ground is broken, and the master or elder of the family needs to use some auspicious words, it can have a certain effect of seeking good fortune and avoiding evil, such as "rain from the sky, giving wealth and blessings, and endless".
It is not good to start digging in rainy and cloudy days, but some people think it is good to start working in rainy days, because rain can moisten the land and make the building stronger.
Therefore, whether it rains during the peak period in Gai Lou depends on the specific situation.