My mileage per ride doesn't necessarily drop BUT my enthusiasm certainly does! Like another post reply said, 60 degrees in the early Spring isn't quite the same as 60 degrees in the Fall. I too, prefer the warm ride in the Summer months. I will say tho, if I'm dressed properly, once I'm "out there" I usually have an enjoyable ride and I feel good about it. It's the "getting going" part that's hard when it's cold, windy and gloomy.