I don't know what's coming for Christmas Eve/Day but it was warm enough here this weekend for this:
It was supposed to be in the mid 50s (Fahrenheit for you heathens in foreign lands) but I think it may have been warmer than that on Saturday. Of course it rained like mad the whole time, even had a proper thunder and lightning storm overnight on Saturday, but that was the only reason you'd need a coat because long sleeves would've been plenty. I had a sweater and a coat on when I went out in the morning and by lunchtime I was burning up in them.