Weather station giving wrong outdoor temperature...

Question

Accurite weather station gives wrong outdoor reading. It currently says 84 degrees and yet it is winter and only about 42 degrees. This started happening a few weeks ago. I have changed the battery on both stations. outdoor station is located on a dry place outdoors where it has been for the last one year. Brought it in, cleaned it but still same problem. Anyone know what made this happen out of the blue?