Outside is Strange

[lynxreign]

I went outside a few minutes ago and walked across Copley Square for a snack. I then walked back to the Hancock Tower where I work. When I got back inside I noticed the strangest thing: I wasn't wet! I didn't bring an umbrella or a coat or anything! When I got back to my office I walked to the East Windows and the sky looked very strange indeed. Most of the sky was a normal, reassuring grey with bits of darker grey and bits of white, but there was a patch! A strange patch of color! Color in the sky! It was... blue. BLUE!

What could this mean?