nebbioso in English:

The sky is a hazy shade of winter.

The dividing line is somewhat hazy.

the hazy days of summer

Even though the morning was hazy, it cleared up.

The information she provide was a bit hazy.

... we're all a little hazy...

hazy memories

She slowly disappeared into the foggy forest.

It's foggy, I can't drive.

foggy mornings

A murderer walked the dark, foggy streets of London.

The weather is foggy today. His mind was still foggy. It's foggy today.

It was to foggy to drive yesterday.

It was a dark and foggy morning, Suzan was scared.

London is a very foggy city because the air is really dirty.

It's so foggy that the plane can't take off

In November it's often foggy.

a foggy day in November

It isn't easy to drive on a foggy day.

It’s often rainy and foggy in England.

If the weather is bad, we shall stay in a hostel or otherwise we might easily be lost in the mountains; especially when it is foggy and rainy.

It was foggy, so it was hard to make out the figures of people walking.