A comfortable 43F when I left the office yesterday. Record time on the ride home last night (again - second time in a row...) this time with the backpack and no tailwind. I guess the whole rest/recovery thing really does make a difference! I got what I thought was going to be a nasty calf cramp at about mile 13, and wasn't looking forward to walking the last 2 miles. But I managed to stretch it out a bit, and then it just disappeared about a mile later... Guess I should adjust my balance of coffee and water intake on days that I ride...