>>973428Fenders & a longish raincoat. Shorts won't get wet in most rain with fenders. It's mostly the spray from the road that does them in.
If your clothing is light, just enough to stay warm and you're fit, it is possible to stay dry. Takes a lot of experience though.
>>973378Get a high end shell from a big outdoor retailer (preferably on sale) and waterproof spray it. The expensive-ish ones are pretty amazing and will breath while keeping you dry. Shell + merino base layer or jersey + bibs or shorts & underwear is how i normally do it.
You could go shoe covers, but they do let water in from the holes around the cleats. If it's only a short ride, i'd go regular goretex shoes/ boots & gaiters with cage pedals. They stay 100% dry. It is quite amazing. I can stand in rivers in my goretex boots.
Another option seeing as it's hot would be spd sandals, which would be really comfortable wet with no socks, and would probably dry by themselves- shimano make them, and sheldon loved them.