I grew up near the geographic center of the United States. The topography of that region is hilly, sitting only a little above sea level. There's a lot of farmland there, but also plenty of wooded, forested areas.
During the summer there was usually plenty of rain, which is good for farms, good for forests. There was also plenty of humidity. Most days, the sky looked white. It was because of all the water in the air. On days with unusually low humidity, the sky was a soft, baby blue.
When I was a kid, truly blue skies existed only in pictures. I also found them on family road trips to the American West. Out there, arid and semi-arid climates went hand in hand with far less humidity and spectacularly blue skies.
This picture reminded me of the color of a clear western sky.

I took this picture near the Corniche. In the photo the area looks desolate or even forbidding, but it isn't. It's funny how a photo can do that.