Tell me you know the "omen" before rain.

Rural proverb: Swallows fly high, sunny days come, swallows fly low, bringing rain.

Ants move the snake aisle, and it will rain heavily soon.

Rainbow sun in the east and rainbow rain in the west.

The moon has long hair (halo), so it rained.

Dragonflies are flying low on the banks of rivers and lakes, and rain is coming.

Besides, the water tank will sweat and rain.

The concrete floor is wet, and there will be strong winds or heavy rains.