雲うん量りょう

noun

cloud cover; degree of cloudiness

Meteorological term for the fraction of the sky covered by clouds, often expressed in tenths or oktas.

• 今日きょうの雲うん量りょうは8で、ほとんど曇くもり空ぞらです。

  Today's cloud cover is 8, so it's mostly overcast.

• 気き象しょう観かん測そくでは、雲うん量りょうを0から10の11段だん階かいで表あらわします。

  In weather observation, cloud cover is expressed on an 11-point scale from 0 to 10.