"dark billowing clouds" isn't a sentence. Dark and billowing are adjectives describing clouds, a plural noun.
Yes, "It rained all night." is a complete sentence.
I gazed at my friend carefullyI gazed at the broken vase
The full moon illuminated my yard. The crescent moon peeked out from behind dark clouds.
1. Ominous silence preceded the results of the elections. The governor was sure he's not going to make it. 2. The dark clouds looked brooding and ominous, a violent storm was heading their way.
'i had a sense of foreboding that something terrible was about to occur' The foreboding wail of a klaxon warned him of an impending attack. Dark clouds streamed in from the ocean, foreboding an impending storm.
Dark billowing raining clouds are often referred to as storm clouds. These clouds typically bring heavy rain, thunder, and lightning as part of a storm system.
Puffs of dark smokes came billowing from the factory's smokestacks.
Someone's temper cannot really be "stormy". There are no dark clouds, lightning flashes, forceful winds. So stormy temper is a figure of speech.
End the sentence with a period. No other punctuation is necessary.
Today I noticed the dark clouds in the sky, and I decided not to take our dogs out for a walk, for fear of rain.
Yes, "It rained all night." is a complete sentence.
"It is stormy outside, with dark clouds and heavy rain."
The dark clouds were foreshadowing the storm that was to come.
Dark storm clouds were looming on the horizon, casting a sense of impending doom over the peaceful village.
The dark storm clouds foreshadowed the approaching bad weather.
The thick, dark, gray clouds signaled that ominous weather was on its way.
The thick, dark, gray clouds signaled that ominous weather was on its way.