As long as the roads are dry, where there`s a will there`s a way:
January century done on Jan 6! 103.8 miles, time 7:21:00, avg speed 14.31mph, 3070 ft of climbing.
Temp at start of ride was 8 degrees Fahrenheit (-13C), but it warmed up to 30. By the end of the ride it was back down to 26.
Kept warm with wool base layers, Lake winter cycling boots, wool socks, chemical warmers, lobster gloves, the usual winter cycling stuff.
This is a route I did in August with an average speed of 16.89mph. What a difference five months make.