What is Going on With the Weather

It is got into the 80's yesterday and is doing the same today. Last night, we saw Trixie, our calico, waiting on the deck rail to get into the house. She was sitting under the porch light and something was bugging her. When my husband went to let her in he saw a hummingbird dive bombing her head. Why do we have a hummingbird here in February? Also, we already have May flies. What's up with that?