The wind will definitely have a cooling convective effect since it will blow the layer of slightly warmer air away from the exterior of your wind resistant shell, but it isn't appropriate to use those wind-chill/feels-like calculations when you're mostly protected and insulated from the wind.
For example it was -24C windchill sat morning but only -12C temperature and having been oustide at -24C on a bike before i can tell you it felt nowhere near as cold as the windchill calculation told me it should feel.
Last edited by electrik; 01-03-10 at 09:18 PM.