What natural phenomenon knows it will rain?

Ants digging holes in the ground think it will flood when it rains, that is, they will run away before it rains.

Second, the snake gallery, the rain is coming

Most snakes hide in caves during the day and go out for food, water, bathing and molting at night. However, when the weather is particularly humid and sultry, holes will also be forced. Therefore, it is a sign of rain when a snake comes out of the hole during the day, especially in late autumn and early winter. It is already cold, and when a big snake comes out of the hole, it will rain in a day or two. It is the verification of "the big snake comes out of the hole and it rains" and "the snake gallery rains".

Third, the earthworm comes out of the hole.

The ground is wet and soft, and earthworms will crawl out of the ground, which indicates that it will rain. ?

Fourth, flying insects fly low.

Generally, before the rain comes, the air humidity will increase greatly and the air pressure will drop significantly. The moisture in the air will condense on their wings, and the wings of insects will become heavy.

5. Will rheumatism patients have sore knees?

Extended data

A popular saying about weather identification, natural weather says:

When the red clouds turn black, there will be heavy rain.

There are beans in the sky and the sun on the ground kills people.

Dark clouds rise at sunset and the sound of rain rings at midnight.

Sunset carmine, either rain or wind.

Walking in the sunset glow, the rain is already after midnight.

Clouds are flowing in the sky and rain is dripping on the ground.

There are dark clouds in the northwest, and thunderstorms are bound to come.