When locks turn damp in the scalp house, it will surely rain. Guitar strings shorten before a rain. Dandelion blossoms close before a rain. When the milkweed closes its pod, expect rain. The ppitcher plant opens wider before a rain.
Chickweeds close their leaves before a rain.
Closed is the pinkeyed pimpernel before rain. If smoke falls to the ground, it is likely to rain. Campfires are more smky before a rain. The factory smoke stack is more of a nuisance before a rain. If toads apear in large numbers, expect rain.