Do you think those are rain clouds on the horizon?
The sky was a perfect blue - not a cloud in sight.
Dark clouds gathered overhead.
Except for the first day, the sun was with us all the time, with absolutely no cloud in the sky. (Preliminary English Test; B1; French)
A huge cloud of smoke from burning oil tanks stretched across the sky.
Some of them leave behind a large cloud of smoke and it damage[s] our health. (First Certificate in English; B2; Spanish)
When I heard I got the job, I was on cloud nine!
But now, after the promise in which both said "yes," she was on cloud nine. (Certificate of Proficiency in English; C2; German)
to cloud someone's judgment/vision
Having their judgment somewhat clouded by hormones should not take precedence over all other concerns. (International English Language Testing System; C2; Hebrew)