"Whew, it’s as cold as the North Pole. Which way is the wind blowing?”
And as he said that, Mr Banks popped his head out of the window and looked down the Lane to Admiral Boom’s house at the corner. ....
“Ha!” said Mr Banks, drawing in his head very quickly. “Admiral’s telescope says East Wind. I thought as much. There is frost in my bones. I shall wear two overcoats.” - Travers, (1934). Mary Poppins, chapter 1.
I've never forgotten that bit in the book whereby the cold, harsh, violent East Wind brings the other-worldly Mary to the children. Well before I read The Lord of the Rings
, I learned from P. L. Travers that the British find their East Wind cold and somewhat magical. And why not? It comes from Siberia - and it comes rarely, as the usual wind in Britain is from the West, carrying the warmth of the Gulf Stream into its northern latitude.
For Tolkien all that ties in perfectly with his proto-British mythical geography whereby the West points heavenward and the East points to the opposite, even though the northwest of Middle-earth actually would not have the same weather patterns as his native island.
Of course, in Texas, the Biblical lands, and Japan ('East Wind, Rain' was its coded war warning to its diplomats just before Pearl Harbor) there would be other associations. They are in different parts of the globe, with different arrangements of land and sea, warmth and cold, and prevailing winds.