Accurately describe the weather forecast

Since ancient times, farmers have been living on land, and the cultivation of land depends on the weather. Therefore, farmers in rural areas attach great importance to the weather. Without advanced science and technology, it is impossible to accurately predict what the weather will be like. According to the things, changes and long-term life experience observed in life, farmers have summed up a set of their own proverbs and can even predict the weather for months. The accuracy is amazing.

First, it rained on the fourth day, and it rained every day.

If it rains on the fourth day of every month, you can see it almost every day this month. According to farmers' experience in every rainy day, although it doesn't look so accurate now, as long as it rains on the fourth day of each month, it will be more rainy this month than before.

2. Swallows fly low in the snake corridor, ants move and toads bark, and heavy rain comes in the blink of an eye.

This proverb can be said that every household should have heard it, and I also paid attention to it when I was a child. Its accuracy is quite high. According to today's scientific discovery and observation, swallows fly low because the air pressure is low before it rains, and the weather will become wet. Some small insects can't fly high when their wings are wet with water vapor, while swallows can fly low when they eat these insects. What the snake gallery said is that it will rain soon, and the weather will be cold and humid. As a cold-blooded animal, snakes will be uncomfortable and need to come out and find some dry places. Every time it rains, snakes will come out to climb, so there is a snake gallery.