Not the ideal bicycle commuting community, but I've managed to make do.
I'm a 34-year old new father with a 6-month old daughter and a 9-month old bicycle commuting habit. I'm a software developer, and my commute is roughly 8 1/2 miles in each direction.
I ride a crappy Mongoose hybrid mountain bike. I've picked up a bunch of beginner gear since I started riding - rear rack, plastic fenders, rain-proof panniers, Planet Bike lights for front and rear, etc. Picked up some good cold weather gear for Christmas as well. And yeah, my bike is probably close to 60 pounds fully loaded down.
I've ridden as cold as 29 degrees (F) - and fell flat on my face on some ice that morning. Since then, I keep it to 35 or above. My hottest commute home was about 101 degrees.
As I'm a commuter, I've had a couple tough experiences - nearly been sideswiped by a handful of vehicles, but nothing too stressful.
I'm committed to my commuting habit now, so I'm starting to shop for a bike upgrade, and here I am!