as was stated distress sounds work year round.
I do not believe coyotes have the ability to reason.That said any prey distress, anytime of year works .
I use puppy whines year round for both bobcats and coyotes.Even though there are no coyote pups in the dead of winter puppy whines are still very deadly during the winter months. In other words a coyote doesn't have the ability to think "hey there are no pups right now this must be a trick " they will come to investigate reguardless of the time of year!