IF you have to ride into that 10-20 mph wind, you will be going so slowly that the "30 mph equivalent" wind will have a lot more time to chill you.

PLUS, if you are riding perpendicular to the wind, the percieved windspeed will be greater than your actual speed.

AND you'll get colder when you stop.

SO I think windy days are colder than non-windy. Don't forget to factor in the humidity (heat index)!



One interesting thing from vger285's graph is that apparent temperature is not linearly related to wind speed. At 0F, the difference between 50 and 60 mph is only two degrees, but the difference between zero and ten is 15. So riding into the wind half the time + with the wind half the time you'd be warmer. But if you ride into the wind, you have to go slower, so you get chilled more. Which is to say I don't know and don't really ride much below 40 degrees anyway.