the sun-warm factor

We had another sub-zero night last night and a cold day today.  I think the temperature actually climbed to 12 degrees today.  Of course, through it all we heard dire warnings of wind chill factors (as low as 20 below this morning) but I think some consideration should be given to the "sun warm" factor.  Even if the temperature is sitting at 10 degrees, when you walk outside into blazing sunshine, it makes you feel warmer.  I haven't figured out how to measure it but I would like to hear a weather report like this "the high today will be 12 degrees, but when you stand in the direct sunlight it will feel like 23 degrees."  Doesn't that sound encouraging?