While the changing leaves of October might dazzle tourists, for many Seattle residents, the tail end of the month marks the beginning of a mental health dip. A recent survey of 100 clinical psychologists and mental health researchers sheds light on why late October, in particular, tends to be a mood sinkhole in the Emerald City.
1. The Light Switch Effect
Dr. Maria Klein, a seasonal affective disorder (SAD) specialist, notes that around October 25, Seattle sees a sharp decline in sunlight, often losing 2–3 minutes of daylight per day. “It’s not just gradual darkness,” she explains. “It’s the suddenness that jolts the brain’s serotonin production.”