Riding is possible year-round where I live in northern New Mexico. I'm at 5000 feet, so warmer in the winter than Santa Fe or Los Alamos. Snow usually melts off the roads within a day or two. Some days in summer can be hot, but rarely over 100 degrees, and it cools down at night enough to get a break. Mud houses (adobe) with 2-3 foot thick walls can keep 90 degree days and 50 degree nights averaged out to 70 degrees rather well.

The main impediment to riding here are windy spring days. I mean very windy, all day long, often with an unhealthy amount of dust in the air. But they blow over in a couple of days and it gets nice again.