What do you mean if it rains in summer, even if it is strong, it is hard to stay?

It means it can't rain in summer If it rains, fruits and grains will be affected, so less rain will be harvested at this time.

A similar proverb:

1, "There is no rain in beginning of autumn, and everything is never harvested." When there was no rain in autumn, the friends who planted the land were very worried, because all the crops would be halved; People used to depend on the weather to get food, but now people can water the land, so it will be much better, but the harvest will still be affected.

2. "10% of crops are harvested at maturity, and 20% are lost at maturity." This sentence is about crops, especially wheat. If you harvest at the age of nine, you will reap the most. If you wait until you are ten years old and mature, you will lose 20% for nothing, which tells us to seize the opportunity to gain.

3. "Once it rains in early autumn, there is gold everywhere." This sentence means that when it begins to rain in autumn, crops can replenish enough water and produce seeds or fruits, so the harvest will be good.