"It is cold just now."
Translation:Tha i fuar an-dràsta.
As I understand it: He's well now (and he was sick last week) -- comparison: a-nis. It's thundering now (at this moment, at this point in time): an-dràsta.
Or, she was a junior last year, but she's a senior now -- comparison: a-nis. Who is the queen of England now? (at this point in time, at the moment): an-dràsta.
An-dràsta literally means "at this time" -- see: https://en.wiktionary.org/wiki/an-dr%C3%A0sta