I keep on thinking about outerwear for my upcoming trip to Europe - 10 days in London and Germany in early June. I don't /think/ I need a heavy duty raincoat or something superwarm, but I'm not sure what I do need. I'd like something rain-resistant with a hood if possible, but that would look decent and not too slicker-ish if it wasn't raining.

My mom suggested a fleece, but those are so gearish, and maybe too warm anyway? Jean jacket is heavy and not great for the dressier occasions...