cloudless

[ kloud-lis ]

/ ˈklaʊd lɪs /

having no clouds; clear: a cloudless sky.

Origin of cloudless

1350–1400; Middle English. See cloud, -less

cloud·less·ly, adverb cloud·less·ness, noun

Despite the cloudless sky, I tried to convince myself that this also could have been an accident.

The Resilient City: New York After 9/11 |John Avlon |September 11, 2014 |DAILY BEAST
Up above, a skywriter had scrawled a simple, competing message across the cloudless blue.

I’m a Muslim, Please Don’t Hate Me |Sigal Samuel |September 24, 2012 |DAILY BEAST
When first I saw Compton it was a cloudless noon in August, the day of days in which to come alone into this silent place.

Apologia Diffidentis |W. Compton Leith
We started about midnight, a crisp, cloudless night with no moon.

The Fire People |Ray Cummings

Day after day we glided on across the smooth ocean with a cloudless sky, our food and water gradually decreasing.

Peter Trawl |W. H. G. Kingston
Awakening at dawn to find a cloudless sky, I crawled out, pushed off, and was in Glendive before six o'clock.

Down the Yellowstone |Lewis R. Freeman
After a time the sky, which had been bright and cloudless all the morning, grew overcast and gave out tokens of a coming storm.

Continental Monthly, Vol. II. July, 1862. No. 1. |Various