Some of us give a temperature readingwhen we post.
Interesting to know where your thermometers are.
I have three thermometers. One is in the kitchen on the CH controller. It is on a worktop not in direct sunlight. I have another one in the kitchen. A stick thermometer
which ishung on the wall. Again this is not in direct sunlight. Gives similar readings to the CH controller.
The third one is upstairs in the little room where my computre is. This faces he window so it will get sunlight in the morning. At the moment it is reding 18C.