Originally Posted by
jppe
You will be slower in colder weather. Heart rate is higher due to keeping the body warm plus the added clothing. However by riding in this cooler stuff you'll be even faster when it warms up. It is a great, great time of the year to do some slower base mile training.
Of course if you live in southern CA with the minimal temperature modulation you really don't have an excuse for slower results!!!
I don't know what you mean by minimal temperature modulation in SoCal. My morning rides in the summer are at about 80 or 90 degrees. Rides today are in the 30's to mid 50's, with an occasional 20's in the mix. That makes any where from around 30 degrees minimum to an extreem of up to 60 degrees between summer and winter. What is the temperature difference from summer to winter where you live?