I've been comfortable riding in the rain sometimes wearing two or three layers of wool. Synthetic might do the trick, too. I agree with those who use different approaches for different temperatures. When it's warm, I like mesh shoes or sandals, because my feet dry much more quickly than shoes. Also, cotton socks are the worst. I wear wool socks year-round, except when I wear sandals and no socks.

Sometimes I get drenched, though. I would keep one or two complete sets of clothing at work, including socks and shoes.

I like the newspaper-in-the-shoes trick. Salt or baking soda might work even better.

Where are you? I sense you're in Europe, but I'm not sure.