Temp 28, DP 20. Did Dupont->U->9th, then added some on the mall. Took Va back to Thompson's rather than Rock Creek, which I thought would be slick. Sidewalks were a bit slick in parts, great in others. Tried to run on the towpath, but made it all of 90 seconds before wiping out and landing flat on my rear, so swapped to running around the water front to tack on the miles.