Collocations for frosty - adj.

be, look
become, get, turn (BrE)
when the weather turns frosty

remain, stay

very

cold and frosty
The day dawned cold and frosty.

be, look, seem
become, turn
He cool green eyes became positively frosty.

remain

decidedly, distinctly, positively, very
The atmosphere in the room was decidedly frosty.

Frosty is used with these nouns:
morning, reception, weather