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I use a bike poncho, it covers the legs, too, and limits sweating because it is open underneath. Decathlon sells them for cheap, and them works. There is also normal colors, but I prefer to be absurdly visible (I want to see who says "I didn't seen him 🙂)
Every time I use it, I'm amazed I'm dry underneath (the face gets wet).
In any case, even if I don't wear it, I'm unlikely to get soaked, when rain is not that strong. We are not made of sugar!
crosspostated from: https://social.tchncs.de/users/lgsp/statuses/115484700218126774
As someone who's an all-weather cycler, this is not true. You don't get nowhere as wet walking, especially with an umbrella. Also practically everyone owns a raincoat, but nobody owns a bike poncho. If the rain is heavy, visibility at bike speeds is also a significant issue. I once faceplanted because I literally couldn't see a grey bollard in cataclysmic rain.
In case you do that, also bring a fresh pair of socks. Rain has the nasty habit of sneaking into your shoes while dribbling down and there's nothing worse than going the whole day in wet feet.