The best time to go to Cedar Glen for pleasant weather and outdoor activities is during the late spring, summer, and early fall months, specifically from May through October.During these months, the weather is consistently warm and sunny, with average temperatures ranging from the mid-70s to low 80s Fahrenheit. This period is ideal for enjoying Lake Arrowhead, including boating, swimming, and hiking the numerous trails around the lake. Families will find this time particularly good for creating memories, with plenty of opportunities for water sports and exploring nature.For those looking for a quieter experience with fewer crowds and cooler temperatures, the shoulder seasons of May and October are excellent. The foliage in October can be quite nice, making it great for scenic drives and comfortable walks.