Not wearing anything else, because the weather is alsways the same miserable combi of rain and storm: German Army coat from the 80´s/90´s. Fun to wear. Pretty rain resistant cotton-shell and a super-warm plyester-lining. The hood helps too. Very versatile for a coat that you can easily get from EUR 50 or so onwards (mine was EUR 85 and advertised as "new", so it is some sort of repro.).