"Now this is why I love the Mahler board! Finding out about yet more Mahler stuff I have to track down. Who sings this English version of "Im diesem Wetter", and is it available anywhere else without having to buy this film?"
Herb, the movie's translation of "In diesem Wetter" is "In Stormy Weather."
It's sung by Carol Mudie, but I don't believe the song is available by itself or in any collection.
You're stuck with hearing it only in this Ken Russell film, which is really a good thing, as the impact is achieved by the combination of the scary, nervous, fearful music and words, AND by Russell's filming, which shows Mahler's daughters, Maria and Anna (Putzi & Gucki), running through the forest as a menacing storm is brewing. Also "brewing" (shown without words, during the song) is Alma's jealous insecurity about Anna von Mildenburg, and other of Mahler's sopranos, as well as concern for the daughters in this "stormy weather."
Ken Russell did a remarkable job of capturing the "flavor" or ambiance of Mahler's world and his life and family. It's a film I return to again and again. It's currently available at Amazon for as little as about ten dollars, with VHS tapes for even less.
Not, in the traditional sense, a documentary on the life of Mahler, it does succeed in capturing the excitement of his life.
--Constantin