I've called off games when the pitch has been borderline playable an hour before kick off, purely on the basis that if it is borderline after the sun has gone down it simply isn't going to get any better as the temperature drops (relating to cold weather rather than rain). It causes arguments as the clubs say the pitch is playable, but I once got a phone call from a home chairman to apologise as he'd gone from the clubhouse onto the pitch after 9pm and it was frozen solid, whereas it was just a bit crunchy two hours earlier.
It's the same for a 3pm winter kick off as well, if it is frozen at 2pm it just isn't going to defrost in time, and even if it does it is likely going to freeze again before the game can be finished.
I've seen a video of this one tonight where a goal kick hits the ground and bounces so high it was as if it had hit concrete, no way you can play on that.