cloudiness
cloud cover
overcast

Maybe the cloud cover would go away and they'd get a good look.

It was hard to see the mountain because of the cloud cover.

In the second half, cloud cover brought darkness to the field.

The sun had burned off most of the cloud cover over the city.

He could see land through breaks in the cloud cover.

There is also a significant cloud cover on the planets.

However, global analyses of cloud cover over land for the 1976-2003 period show little change.

He turned to look out the window again, as if waiting for sunlight to break through the cloud cover.

The second day saw them well into the mountains, and the cloud cover seemed to sit right on top of the trees.

It could almost have been night, so dense was the cloud cover.