When the Seasons Change: How Environmental Shifts Can Affect Mental Health
As summer begins to fade and the first signs of fall appear, many people notice changes beyond cooler temperatures and earlier sunsets. Energy levels may shift. Sleep can feel different. Anxiety may increase without an obvious explanation. Children may become more emotional or dysregulated, and adults may notice changes in motivation, mood, or concentration.
Seasonal changes affect our environment, routines, bodies, and nervous systems. While some people welcome a new season, others may find the transition surprisingly difficult. Research has demonstrated relationships between seasonal changes, light exposure, circadian rhythms, sleep, and mood (National Institute of Mental Health [NIMH], 2024; Wirz-Justice et al., 2021).
Understanding why seasonal changes can affect mental health can make these shifts feel more predictable and help us develop strategies for moving through them.
Why Can a Change in Seasons Affect Mental Health?
Seasonal transitions involve several environmental changes happening at once. Changes in daylight, temperature, schedules, sensory input, and social expectations can all influence emotional well-being.
For some people, these changes are subtle. For others, particularly individuals who already experience difficulties with mood, anxiety, sensory processing, sleep, or transitions, the effects may be more noticeable.
Changes in Daylight
One of the most significant environmental changes during fall and winter is the decrease in daylight.
Light exposure plays an important role in regulating the body's circadian rhythm, the internal system that helps influence when we feel awake and when we feel sleepy. Light received through the eyes communicates with areas of the brain involved in regulating circadian rhythms, sleep, and other biological processes (Wirz-Justice et al., 2021).
As daylight hours decrease, some people may notice changes in:
Energy
Sleep patterns
Motivation
Concentration
Appetite
Mood
For some individuals, these changes become significant enough to meet criteria for seasonal affective disorder (SAD), a form of depression characterized by a recurring seasonal pattern. SAD most commonly begins during the fall or winter months, although a less common spring and summer pattern can also occur (NIMH, 2024).
However, you do not need to meet criteria for SAD to notice that shorter, darker days affect how you feel.
Temperature and Weather Can Be Environmental Triggers
Our nervous systems are constantly taking in information from the environment.
Temperature changes, rain, wind, humidity, storms, and changes in the physical environment can influence comfort, activity levels, sleep, and daily routines. Research increasingly recognizes that environmental factors, including temperature and other weather-related conditions, can interact with mental health and well-being (World Health Organization [WHO], 2022).
For someone with sensory sensitivities, even seemingly small seasonal changes can create additional stress. Consider how much sensory information changes between summer and fall: heavier clothing, closed windows, heating systems turning on, different smells, colder air, darker mornings, and changes in outdoor sounds.
Individually, these experiences may seem minor. Collectively, they can increase the amount of sensory information the brain and body are processing.
Seasonal Changes Often Mean Routine Changes
Sometimes the season itself is not the biggest trigger. Everything that comes with it is.
Fall often means returning to school, changing work schedules, extracurricular activities, earlier mornings, homework, increased traffic, and less unstructured time.
Later in the season, holidays can introduce another layer of change involving travel, finances, family dynamics, grief, social obligations, and disrupted routines.
Predictable routines can be particularly important for children because consistent schedules and expectations can support feelings of stability and help children understand what is coming next (Centers for Disease Control and Prevention [CDC], 2024).
Transitions require cognitive and emotional energy. For individuals who rely heavily on predictability, seasonal routine changes may contribute to irritability, anxiety, exhaustion, or difficulty regulating emotions.
Children may show this through increased meltdowns, sleep difficulties, clinginess, behavioral changes, or resistance to transitions.
Adults may notice procrastination, difficulty concentrating, increased anxiety, emotional exhaustion, or feeling unusually overwhelmed by everyday responsibilities.
Sometimes the Environment Holds Memories
Seasonal triggers are not always physical.
Our brains can associate experiences with sensory and environmental information. A particular temperature, smell, holiday, type of weather, or time of year may remind us of previous experiences. Trauma reminders can include people, places, sounds, smells, situations, dates, or other cues associated with a past traumatic experience (Substance Abuse and Mental Health Services Administration [SAMHSA], 2014).
Sometimes we consciously recognize the connection. Other times, we simply notice that we feel "off."
For example, a season may be connected to:
The anniversary of a loss
A traumatic experience
A difficult relationship
A previous period of depression or anxiety
Family conflict surrounding holidays
Academic or workplace stress
A major life transition
You may notice an emotional or physical response before consciously recognizing what your brain has associated with that time of year.
Seasonal Transitions Can Affect Children, Too
Adults sometimes assume that children are simply "acting out" when their behavior changes during seasonal transitions. Behavior, however, can be communication.
A child who suddenly becomes more emotional, resistant, distracted, or clingy may be communicating that they are having difficulty adjusting to increased demands.
The transition from summer to school is a particularly significant example. Children may suddenly move from flexible summer schedules to early mornings, structured classrooms, academic expectations, social demands, homework, and extracurricular activities. Consistent routines around sleep, school preparation, meals, and family life can help children know what to expect and support adjustment during transitions (CDC, 2024).
That is a lot of change for a developing nervous system. Rather than focusing only on stopping a behavior, it can be helpful to ask:
What has changed in this child's environment, and what might their behavior be communicating?
Signs That Seasonal Changes May Be Affecting You
Seasonal changes can look different for everyone, but you might notice:
Increased anxiety or worry
Feeling more tired than usual
Difficulty waking in the morning
Changes in sleep
Irritability
Lower motivation
Difficulty concentrating
Increased sensory sensitivity
Feeling overwhelmed more easily
Changes in appetite
Social withdrawal
Feeling sad or emotionally "heavy"
Increased emotional dysregulation
Difficulty adjusting to new routines
Changes in sleep, appetite, energy, concentration, and social engagement can also occur with depression and seasonal affective disorder, particularly when symptoms persist and interfere with everyday functioning (NIMH, 2024).
Not every change indicates a mental health disorder. Instead, symptoms can be useful information about what your mind and body may need.
Strategies for Managing Seasonal Changes
1. Create Predictability During Transitions
When the environment is changing, intentionally maintaining predictable routines can help provide stability.
Try keeping certain anchors consistent, such as:
Wake and sleep times
Morning routines
Meal schedules
Movement or exercise
Evening wind-down routines
Weekly social or recreational activities
For children, visual schedules and calendars can make upcoming changes more concrete and predictable. Consistent routines can help children understand expectations and anticipate what happens next (CDC, 2024).
2. Prioritize Light Exposure
Because daylight plays an important role in regulating circadian rhythms, intentionally getting outside during daylight hours may help support the body's sleep-wake cycle (Wirz-Justice et al., 2021).
Consider opening curtains in the morning, taking a brief walk during the day, working near a window when possible, or spending time outdoors even when temperatures become cooler.
Light therapy is also an established treatment option for winter-pattern SAD, although it is important to discuss treatment with a qualified healthcare professional to determine what is appropriate for your individual circumstances (NIMH, 2024).
3. Support Your Nervous System
When your body is managing additional stress or environmental input, regulation strategies can help.
Experiment with:
Slow, intentional breathing
Stretching
Walking
Warm showers or baths
Weighted blankets or other preferred sensory input
Music
Grounding exercises
Creative activities
Spending time outdoors
Mindfulness
Intentional rest
Regulation does not have to mean sitting completely still. Movement, creativity, recreation, and play can also provide meaningful opportunities for stress recovery.
4. Pay Attention to Sensory Needs
Notice whether seasonal sensory changes are contributing to stress.
Perhaps heavy winter clothing feels uncomfortable. Maybe colder temperatures make your body tense. Perhaps darker rooms make it harder to concentrate.
Small environmental adjustments can sometimes make a meaningful difference. Softer clothing, additional lighting, temperature adjustments, noise reduction, sensory tools, or creating a comfortable space at home may reduce unnecessary environmental demands.
5. Make Room for Play and Enjoyment
As schedules become busier, enjoyable activities are often the first things removed.
Yet recreation is not simply something we earn after completing our responsibilities. Engaging in enjoyable activities, movement, hobbies, creativity, and social connection can be valuable components of psychological well-being and stress management.
Consider intentionally scheduling activities that feel restorative rather than waiting until you "have time."
For children, this might mean unstructured play, art, movement, outdoor time, or opportunities to connect with caregivers without an academic or behavioral expectation attached.
For adults, it might mean returning to a hobby, creating something, playing a game, spending time outside, seeing friends, or intentionally doing something simply because it feels enjoyable.
6. Prepare for Known Emotional Triggers
If you know a particular season, anniversary, or holiday tends to be difficult, planning ahead can reduce some of the emotional burden.
Trauma-informed approaches emphasize recognizing potential reminders and developing strategies that promote safety, coping, and emotional regulation when triggers arise (SAMHSA, 2014).
Ask yourself:
What usually becomes difficult during this season?
Then consider what additional support might help. That could mean setting boundaries around holiday gatherings, scheduling therapy appointments, reducing commitments, maintaining routines, increasing social support, or creating new traditions.
7. Give Your Body Time to Adjust
Not every uncomfortable feeling needs to be immediately eliminated.
Transitions take energy.
Sometimes the most helpful response is recognizing that your body is adjusting and temporarily lowering expectations. Additional sleep, fewer commitments, more downtime, or increased structure may be exactly what you need while adapting to environmental and routine changes.
When Should You Consider Additional Support?
Temporary changes in mood or energy can occur during seasonal transitions. However, consider speaking with a mental health or healthcare professional if symptoms become persistent, significantly interfere with daily functioning, or include substantial changes in sleep, appetite, motivation, relationships, school, or work.
Symptoms of depression and seasonal affective disorder can include persistent low mood, decreased energy, changes in sleep or appetite, difficulty concentrating, loss of interest in previously enjoyable activities, and thoughts of death or suicide (NIMH, 2024).
If you are experiencing thoughts of suicide or are in emotional distress, call or text 988 to reach the 988 Suicide & Crisis Lifeline in the United States.
Paying Attention to What Changes With the Seasons
Seasonal changes can remind us how connected mental health is to our environment. Our bodies respond to light, temperature, routines, sensory experiences, memories, relationships, and expectations.
Instead of asking:
"Why am I suddenly struggling?"
It may be helpful to ask:
"What has changed around me, and what might I need as I adjust?"
Sometimes the answer is more structure. Sometimes it is more light, movement, connection, play, or rest. And sometimes it is additional support.
Paying attention to seasonal patterns can help us recognize our needs earlier and respond before we become overwhelmed.
Premier Psychotherapy provides mental health services for children, adolescents, and adults. If seasonal transitions, anxiety, depression, emotional regulation, or life changes are affecting you or your family, therapy can provide additional support and practical strategies for navigating change.
References
Centers for Disease Control and Prevention. (2024). Tips for creating structure and rules. U.S. Department of Health and Human Services.
National Institute of Mental Health. (2024). Seasonal affective disorder. U.S. Department of Health and Human Services.
Substance Abuse and Mental Health Services Administration. (2014). Trauma-informed care in behavioral health services (Treatment Improvement Protocol [TIP] Series 57). U.S. Department of Health and Human Services.
Wirz-Justice, A., Skene, D. J., & Münch, M. (2021). The relevance of daylight for humans. Biochemical Pharmacology, 191, 114304. https://doi.org/10.1016/j.bcp.2020.114304
World Health Organization. (2022). Mental health and climate change: Policy brief. World Health Organization.
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