People talk about weather all the time, it's a natural conversation opener with strangers, "Nice day we're having." "Looks like it might rain later." "Storm's brewing." etc.
This can also relate to character mood. Example, a growing feeling of hopelessness and despair as the last rays of the sun disappear below the horizon and darkness covers the land, bringing with it a chill loneliness that seeps deep into the character's heart.
Musicians write songs about stuff like "Morning Has Broken" for a reason. Dazzling golden sunshine brightens up the world and chases shadows away, birds sing, everything comes alive with renewed hope, etc.
So yeah, describing the sky could get you something. Not all the time, obviously. Not in every scene. Maybe not in every story. Depends on the timing and the purpose for mentioning it.
-Derek