lost the clock and weather at the top of the screen and I can't get it back.

[AC Question]

Home screen to display date time location weather

 

[belodion]

Take a look in your widget locker. If there, long-press the widget, and drag and drop to where you want it.

 

[tony bag o donuts]

Which device are you using?
Some devices do not allow their native widgets to be used with 3rd party launchers.