The weather is coming back to more normal temperatures. This will be a great time to treat the bees with oxalic acid. I firmly believe that this late mite treatment is an important step for winter survival of a colony. By treating with oxalic acid will make the hive as mite free as possible going into winter. If colony is mite free the odds of wintering improves by quite a bit. I have two video's about how to use and apply oxalic acid a couple of posts ago.