Samsung Galaxy S4 phone. My 5 day weather & clock widget app displays numbers as n/a. What is going on? How can I fix this?

[AC Question]

Samsung Galaxy S4 phone. My 5 day weather & clock widget app displays numbers as n/a.

5 day weather widget app (GalaxyS4) displaying temperatures as n/a. how do i get numbers back.
I have pressed a wrong button somewhere.