Rather than a poncho, I wear this rain cape
Cape de pluie MINIPOIDS 2 WR ( CO.TE.NOR. fabriqué en France ) . A rain cape is a poncho with sleeves, which, in addition to protecting your body against the rain, protects also your arms. And this is not their only advantage: they are much less prone to fly in the wind. Also, if you stop to have lunch, you just lower your head inside, remove your arms from the sleeves and they make a tent under which you can have your lunch and stay dry.