I keep getting a Oh No! Sorry, come back next winter! message when I try to access these places.

I'm getting the same thing - every other time, if you keep trying, it will eventually go, but if this is how "it stays open all winter", it's going to be a real pain.

This is driving me slightly nuts. :(

I'm getting the same problem. Both the snowball shop and snowtapult keep randomly changing their minds about if they're open. I thought they were supposed to be open all winter, not just December but I keep getting a message saying: "Oh No! Sorry, come back next winter!" but if I refresh a couple of times it then lets me buy a snowball/throw a snowball.

I'm having the same problem, I managed to throw 2 snowballs with the snowtapult, but then it "closed"...had to refresh a few more times, threw one more until it was closed again.

Yeah, it's totally hit or miss. I'll be able to buy 5-7 snowballs in a row, then I won't be able to buy any for a few minutes. I haven't been able to access the snowapult at all, though I haven't tried as much.

Please see above! Locking as resolved.