Display current temperature from Goetemp.
Click on the temperature to see when the temperature was last updated on the Goetemp website.
https://extensions.gnome.org/extension/1211/goetemp/
git clone git://github.com/janvonde/gnome-shell-extension-goetemp.git
cd gnome-shell-extension-goetemp
cp -r goetemp@jan-von.de ~/.local/share/gnome-shell/extensions
Restart the shell and then enable the extension.