Seasonal Affective Disorder: When Shorter Days Start Affecting Your Mood
Short answer: if your mood, energy, and motivation reliably drop as the days get shorter, you may be experiencing seasonal affective disorder (SAD) — a form of depression tied to the change in seasons. It's real, it's common, and it's treatable. About 5% of U.S. adults experience clinical SAD, and far more — roughly 38% in one national survey — notice their mood decline in winter. Here's how to recognize it and what actually helps. At Black Psychiatry in Utah, Christopher Black, APRN, PMHNP-BC, works with patients to get ahead of the season.
What SAD actually is
Seasonal affective disorder is a type of depression with a seasonal pattern — most often beginning in fall and continuing through winter, then lifting in spring. It's not "just the winter blues" or a lack of willpower. The leading explanation is that reduced sunlight can disrupt your internal clock (circadian rhythm) and affect brain chemicals involved in mood and sleep. In a place like Utah, where fall arrives with noticeably shorter days, it's worth taking seriously.
Signs it might be SAD
Low mood, most of the day, that returns around the same time each year.
Low energy and fatigue — feeling like you're "running down" as the light fades.
Sleeping more than usual and still feeling tired.
Craving carbs and gaining weight over the season.
Losing interest in things you usually enjoy, or pulling away from people.
If these show up each fall/winter and ease in spring, that seasonal pattern is the clue.
Why timing matters — act early
Here's the practical part: because SAD is predictable, you can often get ahead of it. Many people benefit from starting or adjusting a plan before symptoms peak, rather than waiting until they're deep in it. Late summer and early fall — right now — is the ideal time to put a strategy in place if you know winter tends to hit you hard.
What helps
SAD is treatable, often with a combination of approaches: light therapy (using a specialized light box, done correctly), maximizing daylight and physical activity, therapy such as CBT adapted for the seasonal pattern, and, for some people, medication. The right mix depends on your history and severity — which is exactly what a professional evaluation sorts out. The encouraging message: you don't have to just endure winter.
Frequently asked questions
Is seasonal affective disorder a real diagnosis? Yes — it's a recognized form of depression with a seasonal pattern, not simply a case of the winter blues.
When does SAD usually start? Most commonly in fall as the days shorten, continuing through winter and easing in spring. That recurring seasonal timing is a key sign.
Does light therapy actually work? For many people with SAD, light therapy can help — but it needs to be used correctly and isn't right for everyone. A provider can guide whether and how to use it.
When should I see someone about it? If your mood changes each year are interfering with daily life, or you dread the season because of how you feel, it's worth an evaluation — ideally before symptoms peak.
Get ahead of the season
If winter reliably takes a toll on your mood, now is the time to build a plan. Schedule a consultation (https://d2oe0ra32qx05a.cloudfront.net/?practiceKey=k_1_99810) with Christopher Black, APRN, PMHNP-BC.
This article is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Reading this content does not establish a patient-provider relationship. If you are experiencing a mental health emergency, call 988 or go to your nearest emergency room. For personalized care, schedule an appointment with Christopher Black, APRN, PMHNP-BC at Black Psychiatry.
