Early Morning Before Sun Up on Wednesday

Here is a single picture i took of the hive i have near my garden which is a single deep and one medium. It is the same hive two post below which has all the moisture. Due to the lack of moisture i wonder if its temperature related or have they hatched all the brood they had? I am sure its a little of both. The temperature at 5:45 am was right at 50 deg F...