The percentage or fraction of the sky obscured by clouds.(noun)
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Use "cloud cover" in a sentence
"With the absence of the cloud cover that normally caused the sky over Seattle to resemble cottage cheese that had been dragged nine miles behind a cement truck, the city, for the first time in memory, would have an unobstructed view of one of nature's most mystical spectacles."
"But as she looked up at the six mercury-vapor floodlights casting their artificial moonglow down onto the intersection — the only moonlight visible right now, what with the cloud cover — Halle knew that she and What's-His-Face would never be more than friends and perhaps occasional lovers."
"Kahlan had thought they might have to find a safe place out in the grasslands to sleep and wait for daylight in order to find their way back, but they had been fortunate; a break in the cloud cover had allowed the stars to show them the way."