Cold reduces reciprocity failure, and is used particularly for astrophotography. See http://en.wikipedia.org/wiki/Photographic_hypersensitization#cite_note-15.
My own experience with Kodachrome (RIP) was that very cold weather reduced the blue-green cast of nighttime skies and cityscapes. Note that this could lead to frostbite, by the time the camera is cold enough to matter, and the camera should not be allowed to warm up where humidity can condense on or in it. See the following, from the above URL:
Webb, J. H. (1935). "The Effect of Temperature upon Reciprocity Law Failure in Photographic Exposure". Opt. Soc. Am. 25: 4.
Hoag, A. A. (1961). "Cooled Emulsion experiments". Publications of the Astronomical Society of the Pacific 73: 301.