By the time February arrives, the sparkle of the holiday season has long faded. The lights are down, routines are back in full force, and the promise of spring still feels just out of reach, thanks to our furry friend Phil in Punxsutawney, PA.
For many people, the final stretch of winter feels much heavier than the prior months.
It is fairly well known that the late-winter malaise many experience is directly tied to the reduced sunlight exposure. Shorter days can disrupt circadian rhythms, the body’s internal clock, which regulates sleep, energy, and even mood. Light exposure influences serotonin, a neurotransmitter associated with well-being and emotional stability. Lower light levels are linked to decreased serotonin activity, which can contribute to low mood and irritability.
For some individuals, this pattern becomes clinically significant and rises to what is recognized as Seasonal Affective Disorder (SAD), a subtype of major depressive disorder with a seasonal pattern. SAD typically emerges in late fall and peaks in winter months when daylight is scarcest. Even for those without diagnosable SAD, subclinical symptoms, including fatigue, increased appetite, and reduced motivation, are common.
January often begins with renewed motivation. New Year’s resolutions, fresh calendars, and a sense of reset can create a psychological boost.
However, for many, by late February, that initial surge of motivation wanes. Research on self-regulation suggests that sustained effort toward goals can lead to “goal fatigue,” particularly when rewards are delayed or progress feels slow.
The end of winter can amplify this process. Environmental cues such as gray skies and the continued cold temperatures can offer little external reinforcement. When effort is high and visible payoffs (like warm weather or social activity) are low, motivation can dip sharply.
Winter naturally reduces social interaction. Cold weather limits outdoor activity, and post-holiday schedules become more routine and inward-focused. Social connection is a key protective factor for mental health; reduced interaction can increase feelings of loneliness and perceived isolation.
By late winter, this contraction has been ongoing for months. The cumulative effect can create a subtle but persistent sense of stagnation. Humans are highly responsive to environmental novelty and stimulation; prolonged monotony can reduce positive affect and increase rumination.
But there is figurative (and literal light) at the end of this winter tunnel.
Understanding the psychology of late winter can reduce self-criticism. Lower energy, increased sleep, or reduced motivation during this time are often biologically and environmentally influenced, not personal failings. Strategic light exposure (e.g., morning outdoor walks or light therapy), intentional social contact, and breaking large goals into smaller milestones can buffer against the seasonal dip.
Most importantly, the last two months of winter remind us that mood is not solely internal; it is deeply embedded in environment, rhythm, and season. And like winter itself, this phase is temporary.
Dr. Dan DaSilva is a neuropsychologist with specialties in aviation and pediatric neuropsychology. He is also a neuropsychological consultant to the pediatric neuro-oncology and pediatric seizure disorder programs at Morristown Medical Center and at Overlook Medical Center in Atlantic Healthcare’s Neurosciences Institute.
References
American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.).
Baumeister, R. F., & Vohs, K. D. (2007). Self-regulation, ego depletion, and motivation. Social and Personality Psychology Compass, 1(1), 115–128.
Rohan, K. J., Roecklein, K. A., & Haaga, D. A. F. (2009). Biological and psychological mechanisms of seasonal affective disorder. Journal of Affective Disorders, 117(1–2), 1–10.*
