There's no windchill in a bike trailer with a plastic screen.
Hmmm? Interesting way to look at it. True the wind isn't in direct contact with the skin but that holds true with clothes as well. So is it that we don't need more clothes to stay warm when it is windy?
Of course I could be wrong based on the NWS --
According to the NWS --- "Yes. The only effect wind chill has on inanimate objects, such as car radiators and water pipes, is to more quickly cool the object to cool to the current air temperature. Object will NOT cool below the actual air temperature. For example, if the temperature outside is -5 degrees Fahrenheit and the wind chill temperature is -31 degrees Fahrenheit, then your car's radiator will not drop lower than -5 degrees F." I might add that this also holds true to your body. Your body wouldn't go below - 5 degrees. So wind chill is more a measure of the speed of cooling.
What the NWS does not state here is that heat dissipates and wind rapidly increases the rate this occurs. Thus Sunday evening I was out and it was 60 degrees with no wind. I felt fine in my long shirt and pants. Had there been a 15 MPH wind I would have needed another layer due to the dissipation factor.
Same holds true for buildings. A house takes more to heat on windy days as the outside wind facilitates the rapid loss of heat from the dwelling.
So in this case I would say that the bike trailer would not go below 14 degrees but that the children would need to generate more heat in order to stay at 98 if it was windy or to wear more clothes to maintain their heat than if there was no wind.
So I think wind chill is a good indicator to dress warmer! lol