Typical conditions during this mid-summer month in the San Bernardino Mountains feature warm, sunny days and cool evenings. Average high temperatures range from the low 70s to low 80s Fahrenheit (low 20s to high 20s Celsius), while nighttime lows often dip into the 40s and 50s Fahrenheit (single-digit to low teens Celsius). Afternoon thunderstorms are possible, though generally brief and localized. The area experiences relatively low humidity, contributing to comfortable conditions even on warmer days.
This mountain climate offers a refreshing escape from the summer heat of Southern California’s lower elevations. The pleasant temperatures are ideal for a variety of outdoor activities, from hiking and mountain biking to water sports on the lake. Historically, the area has served as a popular summer retreat, drawing visitors seeking relief from the heat and access to the natural beauty of the mountains. This seasonal influx contributes significantly to the local economy.
