In reply to freeflyer:
Thanks for the link. As you say, not exactly what I sought, but still interesting. Surprisingly, no data for Kendal. Nearest station to me is Morecambe, which I imagine would have very similar stats to my spot.
Not surprised to find Ambleside has almost exactly twice the annual rainfall we get, and that the figure I quoted above for this December is about normal for December in Ambleside. Interesting too that Keswick is considerably drier than Ambleside.