Seasonal Depression Affects Californians in Winter
Seasonal Affective Disorder (SAD) is a form of depression that follows a recurring seasonal pattern, typically during the winter months. Contrary to popular belief, SAD is not caused by cold weather but by reduced daylight hours and later sunrises. In California, shorter winter days, coupled with phenomena like the Central Valley's tule fog and Northern California's rainy season, can lead to a significant reduction in sunlight exposure. This can disrupt the body's internal clock and serotonin levels, triggering symptoms such as oversleeping, carbohydrate cravings, fatigue, and social withdrawal. Bright light therapy, cognitive behavioral therapy tailored for SAD (CBT-SAD), and antidepressants are evidence-based treatments for managing this condition (Lean Medical, 2026).
