If an elephant puts its trunk straight up in the air and then hauls it back, stormy weather is coming.
Snow is generally proceeded by a general animation of man and beast that continues until after the snowfall ends.
A hard winter will come if onion skins or nutshells are unusually thick.
Moon changing in morning indicates warm weather ; in the evening, cold weather.
If you accidentally drop salt on the ground, it will rain.
When ducks quack profusely, they are said to be "calling for rain."
Of pimpernel, whose brilliant flower
Closes against the approaching shower,
Warning the swain to sheltering bower
From humid air secure. -C.L. Prince
The gentian (Gentiana pneumonanthe) closes up both flowers and leaves before rain.
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