As summer nears its end, I'm very curious to know what everyone does to handle the rain. For myself, I throw on a pair of rain pants over rubber rain boots with a GoreTex rain jacket.
At my work desk I have an old pair of Toms shoes that I bought at Goodwill that are super comfortable - I slip into them when I arrive and out of them when I leave.
I have a waterproof Timbuk2 saddlebag-style pannier, which I use to bring my lunchbox.
If you're intimidated by riding in the rain, give it a try! It's really quite invigorating and people will think you're either crazy, or a badass. Both seem fine to me!
I never wear a hard shell, even back when I was riding in soggy Seattle. I just get soaked from sweat instead of the rain.
In warm weather: Quick-drying synthetic fabric, usually a road jersey and Lycra shorts. I just expect to get wet.
In cold weather: Water-resistant softshell tights and jacket. I also have winter-specific clipless shoes with neoprene uppers.
Full-coverage fenders, Ortlieb bags, and bright lights are a must year-round.
Do you have clothes to change into then when you get to work?
Yes, always. I carry a change of clothes in my panniers.
I am also lucky to have a locker room with showers at the office.