When the stars are running on sky it is the sign of rain.
When the curlew whistles it is the sign of rain.
When the swallows are tipping the water in summer it is the sign of rain.
When the frog has a yellow back it is the sign of fine weather and when he has a black back it is the sign of bad weather.
When the sheep are lying in the morning it is the sign of a fine day.
When you see the birds flocking together it is the sign of rain.