And Then I Found This...
While searching, I found FAQ.org and the World of Sport Science. In their article on "Cold Weather Exercise" they site the following tid-bits of comforting information and something to consider:
"Cold weather affects the bodily systems in different ways. The cardiovascular system, the heart-connected network of vessels that distributes blood throughout the body, responds to cold stimulus by increasing blood pressure and heart rate, and reducing the amount of blood closest to the skin surface. The airway passages of the cardiorespiratory system, which governs the breathing mechanisms, tend to narrow, making the inhalation of air more difficult. Persons who are susceptible to asthma or exercise-induced bronchitis have greater difficulty breathing in cold air. The bodily stores of glucose, stored as glycogen in the liver and muscles and converted to the energy component adenosine triphosphate (ATP), are depleted approximately five times more quickly in cold weather, a circumstance that forces the body to switch to the conversion of body fat to ATP for its energy requirements."
Several reasons why I don't bother racing long distances in the cold.