It is situated at an elevation of approximately 4,200 feet, which gives it a unique climate compared to the coastal areas of Southern California. The town experiences four distinct seasons, with warm summers and cool winters. Average temperatures range from the 60s°F in summer to the 40s°F in winter, and occasional snowfall is not uncommon.
The hydrology constituents in Julian are primarily influenced by the Cuyamaca Mountains and the nearby Cuyamaca Rancho State Park. The area is known for its pristine natural springs and creeks, which contribute to a rich watershed system. These water sources provide a vibrant ecosystem that supports various species of plants and wildlife.
Outdoor recreation opportunities in Julian abound, attracting nature enthusiasts and adventurers. The Cuyamaca Rancho State Park offers numerous hiking trails, scenic viewpoints, and camping sites. Visitors can explore the diverse flora and fauna while enjoying breathtaking views of mountain peaks and meadows. Additionally, the area is renowned for apple orchards and offers opportunities for apple picking, cider tasting, and enjoying homemade apple pies. Julian provides a perfect retreat for those seeking outdoor activities in a picturesque mountain setting.
Julian receives approximately 588mm of rain per year, with humidity levels near 74% and air temperatures averaging around 15°C. Julian has a plant hardyness factor of 8, meaning plants and agriculture in this region tend to thrive here all year round.