The best I've really come up with thus far is a chronological weather history of the British Isles located here (which might help someone else out, as it seems to be reasonably comprehensive insofar as specifics for years and the vast period of time it covers).
So. That said, can anyone help me out here in determining what the snowfall -- if any -- would look like for the UK circa 1450? Maybe I'm just going at it from the wrong angle.
Much obliged. :)