Thermometer affected by heat from house?

No.12552212 ViewReplyOriginalReport
I just bought a thermometer and put it and my outside wall to see how cold it is. How much will the heat from the house affect the readings?

A few stats:
>Apartment at the 7th floor
>Built in the 70s so I guess the U-value is around 0.9 W/(m2K)
>Inside temp: 22C
>Outside temp: -12C
>Wind: 2 m/s