I have a problem that I was thinking you all might be able to help me with. I know that it typically rains 5 out of 31 days at a particular location. If I were to recalculate the odds for 2 more days, how would I do that?

Day one the odds would be 5/31, but I know it would not be 5/30 on the second day. I'm a bit rusty on my stats here.