Climate
The Angeles National Forest is in Southern California, and the weather acts accordingly. For much of the year the forest has warnings posted regarding fires. Even at some of the higher elevations it can stay a bit warm. During the winter, however, it can get cold. From the months of December through March there is often snow on the ground to be enjoyed by those up for some skiing, innertubing, or general snowplay.
Understand
The Angeles National Forest borders the San Bernardino National Forest. Some areas of each are only really accessible by travelling through the other. Sometimes this means that the forests are referenced interchangeably and it is often hard to discern in which national forest some locations are.