Why does it rain on weekends?

Because the cycle of atmospheric movement is about one week. Especially in winter, this rule is more obvious. For example, cold air is brewing in Siberia, all the way south, and it takes only one week to reach the south. So if you catch up with the weekend once, the next few consecutive times may be on the weekend. However, this rule is not certain, so in a few weeks, the rainy weekend will be over!