Question

Is this a simile?

Just this void. The days raw and wide as this drought-blue sky. Just this nothingness. That's what hurts.
Is it a simile because the day is being compared to the sky?

Answer 1

It's more specific, but that is the idea. The days raw and wide as...sky. You could use the word "like" instead of "as". The simile is always "given away" by "like" or "as" or other words meaning the same thing.