the sky is so dull and gray
the sky is covered with gray clouds
gray clouds that are covering the sky
rainy clouds are visible on the sky
line of trees are grown behind the buildings
The sky is very cloudy
The sky appears to be overcast
a scene during the day time 
cars on the street 
some trees in the background 
power lines in the air 
a scene outside 
several cars parked in a parking lot on a street