Right now is the time of year that I'm a little cooler in the mornings on my commute. When things get too cold, my knees begin to ache a little. That means, yes, I'll throw on my cut-off capri pants.
I get made fun of when I walk in to the office pushing my bike with my short pants on. But it's worth it. I don't sweat like a hog yet my knees stay warm.
Looking silly is an easy sacrifice for a serious bike commuter.
Get out there.