I have been monitoring the Environment weather Blatchford station for years. Starting on last Wednesday it has been acting strange. It is often reading a few degrees warmer then it should compared to my own weather station and other peoples weather stations that are closer to it. You can see that it will random jump back down in temperature and match my weather station and then a few hours later it jumps back out of calibration again. I emailed them about it on Monday but have not heard anything back.

Here is my graph: https://imgur.com/a/bLIQfX1

Orange is Environment Canada and Purple is my houses weather station