Of course, it doesn't have to be winter. Anything under 50° F seems to inspire awe in those that don't ride.
The temperature was 30°F when I rode to the grocery store yesterday during my lunch hour. I got some strange looks and one, "Isn't it too cold to ride a bike?"
Last weekend, my son Peter and I took a 24 mile ride that we'd been meaning to take since this last summer. It was 63° out, warm enough for shorts, although I still went with a long sleeved tee shirt. Not bad for late November.
As warm as it was, I expected to see more people out on bikes. Wasn't the case, and we got a couple "what the heck are they doing?" looks as we sat outside and enjoyed a mid-ride smoothie.
Nearly two months earlier it was ten degrees cooler when Peter and I rode ten miles out to Spin Pizza. As we were locking up our bikes, a couple walked by and we heard the guy say to his wife "Oh, it's normal to see people riding bikes here when it's warmer..."
Fredrick: Abby Someone. Abby Who?
Igor: Abby ... Normal.
Fredrick: Abby Normal?
Igor: I'm almost sure that was the name.