Homemade Night Sky Cloud detector

Where about do I set to show this info,( Misc > Program ) is it in the title bar/windows title bar your talking about?

Its Overcast outside tonight even though the local airport metar is showing clear skies. I have the WD screen and logs using Fahrenheit.

Currently I have the following from the real-time screen
64.2 F Outside temp = 17.9 C
62 F Temp in jar = 16.7 C

   above difference is 1.2 C, I enter in 1.5 C in the Overcast section portion and 3.9 C in for Clear skies. Waited a 3-5 minutes and its still showing up as 'Clear night'