So I picked up bike commuting in early August, in Texas. My major concern so far has been 'not bursting into direct flames' while riding.

We had a cold snap this weekend which told me I am in no way prepared for a cold weather bike ride.

I'm a short-round, 5'9" and 270, so I sweat a lot. I don't want to sweat through and then freeze to death because I'm over-warm. I also change clothes when I get to the office (backpack full of laptop and clothes), so I don't need to worry about dual duty stuff. My ride is only about 3 miles each way, so, 20 minutes or so, but it's moderately stop and go due to being downtown.

Here in DFW it's not likely to get below 30 often, and never snows. Does ice occasionally though, probably 1-2 times a winter.

Just looking for suggestions on shirts/coats/pants/shorts/etc. So far it's been thin T's and thin shorts.