Why your mood deteriorates in autumn: 10 habits that imperceptibly worsen your well-being

A bad mood in the fall can be linked to shorter daylight hours, changes in sleep patterns, physical activity, and daily habits. But the season itself doesn't necessarily cause a worsening of psychological well-being.

Sometimes the problem is exacerbated by actions that seem completely harmless: endlessly watching the news, postponing rest, not getting enough daylight, or gradually reducing communication with loved ones.

Research shows that sleep, natural light, physical activity, and social connections play an important role in maintaining mental health. However, prolonged low mood should not be automatically attributed to seasonality: sometimes it can indicate depression or other conditions that require medical attention.

Let's look at ten common habits that can worsen your autumn well-being, as well as ways to change them without radically changing your life.

Why does your mood worsen in the fall: what happens to your body?

Autumn mood swings have not only a psychological but also a physiological basis.

As daylight hours shorten, the amount of natural light that humans receive changes. Light is an important external signal for circadian rhythms—the internal biological processes that regulate sleep and wakefulness.

In particular, light affects the circadian rhythm of melatonin, a hormone involved in sleep regulation. Therefore, changes in the length of the day can affect feelings of alertness, the time it takes to fall asleep, and the time it takes to wake up.

The National Institute of Mental Health (NIMH) also links seasonal mood swings to disruptions in circadian rhythms and possible changes in mood-regulating systems, although the exact mechanisms of seasonal depression are still being studied.

It is important to distinguish between two conditions.

The fall blues are a common term for a temporary mood swing, loss of energy, or reluctance to do usual activities. It is not a medical diagnosis.

Seasonal affective disorder (SAD) is a form of depression that has a recurring seasonal pattern. Symptoms often begin in the fall or winter and subside in the spring. To make a diagnosis, a doctor will assess the nature of the symptoms, their duration, and their recurrence over the years.

Not everyone who feels low in energy in the fall has seasonal affective disorder, but daily habits can affect how you feel, regardless of your diagnosis.

10 everyday habits that can worsen your mood in autumn

1. Starting the day with your phone instead of natural light

In the fall, the sun rises later, and many people spend the brightest part of the day indoors. If you wake up and immediately pick up your phone, eat breakfast in front of the TV, and then work on your computer, you may be getting almost no natural daylight.

This is important because light helps the body synchronize its internal biological clock with the circadian cycle.

In a 2025 study reviewed in the journal Nature Reviews Psychology, greater exposure to natural daylight was linked to improved positive mood, even after accounting for physical activity. However, the study doesn't prove that the same amount of light will have the same effect on everyone.

What to change: If possible, get some daylight in the morning. This could be a walk, a walk to work, or a short break outside.

Even on cloudy days, being outside usually provides more natural light than working indoors.

2. Disrupt your sleep schedule and make up for sleep deprivation on weekends

Dark mornings can provoke a desire to sleep longer. At the same time, autumn evenings are often spent watching TV series or social media.

If a person goes to bed late during the workweek and wakes up much later on weekends, the stability of the sleep pattern is disrupted.

Insufficient or poor-quality sleep affects the ability to concentrate, regulate emotions, and cope with stress.

According to the U.S. Centers for Disease Control and Prevention (CDC), adults ages 18 to 60 need at least seven hours of sleep per night. However, it's not just the length of sleep that matters, but also the quality of sleep.

To maintain a stable regime, it is useful to wake up at about the same time, reduce the brightness of the lighting before going to bed, and not postpone falling asleep to watch another video.

If sleep is disrupted by air raids, nighttime shelling, or other circumstances beyond a person's control, safety remains the priority. In such circumstances, it is important to use available recovery opportunities rather than trying to stick to a perfect schedule at all costs.

3. Constantly reading disturbing news

The habit of checking the news immediately after waking up, during meals, and before bed can maintain high levels of psychological stress.

Especially if the news feed consists mainly of messages about danger, losses, conflicts, and other disturbing events.

This behavior is often called doomscrolling — the compulsive viewing of negative information.

The American Psychological Association (APA) notes that constant consumption of distressing news may be associated with increased psychological distress. However, doomscrolling is not a separate medical diagnosis.

It is important to distinguish between the need to be informed and the need to constantly check messages.

A practical approach is to leave critical security alerts enabled, and designate a few specific periods during the day for regular news.

This allows you to maintain access to the necessary information without filling up all your free time with it.

4. Almost completely abandon movement

When the temperature drops and the weather becomes rainy, daily physical activity is often reduced.

People walk less often, spend less time outdoors, and choose passive recreation more often.

However, physical activity affects not only the condition of the muscles and cardiovascular system.

The WHO confirms that regular exercise helps reduce symptoms of anxiety and depression, supports cognitive function, and improves overall well-being.

A large systematic review published in The BMJ in 2024 analyzed 218 randomized trials involving more than 14,000 people with depression. The results showed that walking, running, yoga, and strength training can reduce depressive symptoms. However, the quality of evidence for individual activities was limited.

The BMJ

You don't have to start with intense workouts. Regular walking, home exercises, swimming, or dancing may be more affordable options.

For adults, the WHO recommends at least 150–300 minutes of moderate aerobic activity per week, but even less movement has benefits compared to complete inactivity.

5. Fill the entire daylight hours with work

One of the less obvious causes of autumn exhaustion is the lack of a clear boundary between work and rest.

For example, a person starts work at nine in the morning, spends almost the entire day at the computer, and finishes work when it's already dark outside.

As a result, she loses the opportunity to take a walk during the day, postpones personal matters, and gradually reduces her recovery time.

This is especially true for people who work remotely.

High employment in itself does not necessarily cause depression, but prolonged overload and chronic stress can negatively affect mental health.

It's helpful to plan your daily breaks in the same way you would schedule your work meetings. For example, set aside time for a computer-free lunch and a short walk outside.

If there is no way to change your schedule, it is worth at least ensuring regular breaks and not postponing all household and personal chores until late in the evening.

6. Postpone communication with loved ones until better times

Bad weather and fatigue can reduce your desire to meet people. One canceled meeting is not a problem, but the gradual reduction in social contact can sometimes increase feelings of loneliness.

This does not mean that a person must be in the company all the time.

The need for communication is individual, and time alone can be an important part of relaxation.

The problem arises when isolation becomes forced or unwanted.

The WHO Commission on Social Connections report, published in 2025, identified loneliness and social isolation as important factors related to physical and mental health. The organization estimates that approximately one in six people worldwide experience loneliness.

You don't have to organize big get-togethers to stay in touch. A regular phone call, a lunch date, or a walk with a friend can be enough.

What matters most is the quality of communication, not the quantity of social events.

7. Skipping full meals due to fatigue

In the fall, meals sometimes become less organized. Instead of lunch, there is coffee and cookies, instead of a full dinner, there are random snacks.

The problem is not in a particular dessert or favorite dish, but in a situation where the body systematically lacks energy and necessary nutrients.

Malnutrition can be accompanied by weakness, difficulty concentrating, and poor health.

Proteins, fats, carbohydrates, vitamins, and minerals are important for the normal functioning of the nervous system.

At the same time, there is no single universal "autumn diet" that is guaranteed to improve mood.

A practical solution is to plan several simple meals in advance from available foods: cereals, legumes, eggs, fish, vegetables, and fruits.

You should also not self-prescribe high doses of vitamins or supplements just because of seasonal fatigue. In particular, there is no convincing evidence that vitamin D is effective as a universal treatment for seasonal depression.

8. Trying to overcome fatigue with just coffee or alcohol

Caffeine can temporarily increase alertness, but it is not a substitute for a full night's sleep.

If you regularly compensate for fatigue with strong coffee or energy drinks during the day, it can make it difficult to fall asleep in the evening, especially if you have a high individual sensitivity to caffeine.

At the same time, alcohol, which is sometimes perceived as a means of relaxation, can disrupt sleep structure and worsen its quality.

As a result, a person may feel even more tired the next day.

It is more useful to pay attention to the causes of exhaustion: sleep duration, workload, physical condition, and psychological stress.

If fatigue has become persistent, it should not automatically be considered a normal reaction to autumn.

9. Giving up your favorite activities due to lack of mood

When a person feels depressed, it is often more difficult for them to find the strength to do usual, enjoyable things.

She postpones hobbies, walks, meetings, and other activities that used to bring pleasure.

Gradually, the opportunities to receive positive experiences become even fewer.

In psychotherapy, there is an approach called behavioral activation. It involves gradually returning to meaningful and fulfilling activities, even when motivation is low.

This method is used, in particular, in cognitive-behavioral therapy for depression.

In everyday life, you can start with small actions: reading a few pages of a book, returning to a creative activity, or spending time in a place you like.

The goal is not to force yourself to be happy all the time, but to stay connected to activities that have personal meaning.

10. Consider prolonged mood swings as just a normal autumn blues

Perhaps the most dangerous habit is to ignore symptoms that persist for a long time.

Not every mood change means depression. However, persistent sadness, loss of interest in usual activities, and disruption of daily functioning require attention.

Especially if the symptoms last for at least two weeks, worsen, or interfere with work, school, or relationships.

In such a situation, it is not enough to simply walk more or change your diet.

It is worth consulting a doctor to assess your psychological and physical condition.

Autumn blues or seasonal depression: how to tell the difference

Seasonal affective disorder is not just a bad mood because of rainy weather.

According to the NIMH and the British National Health Service (NHS), it belongs to depressive disorders and is characterized by the recurrence of symptoms at a certain time of the year.

Symptoms most often occur in late fall or winter. Some people may experience seasonal depression in spring or summer.

The winter variant is characterized not only by a depressed mood, but also by increased drowsiness, fatigue, changes in appetite, and a desire to socially isolate.

This table is for guidance only and is not intended for self-diagnosis.

When to see a doctor

The following symptoms require special attention:

• persistent depressed mood or feelings of hopelessness;

• loss of interest in activities that were previously enjoyed;

• significant changes in sleep or appetite;

• severe fatigue for no apparent reason;

• difficulty concentrating and making decisions;

• feelings of worthlessness or excessive guilt;

• thoughts of death or harming yourself.

The presence of these symptoms does not necessarily mean seasonal depression. Similar manifestations can occur with other mental or physical conditions.

If suicidal thoughts or an immediate threat to life occur, emergency care is needed regardless of the duration of symptoms.

Does light therapy help with autumn depression?

Light therapy is one of the methods used to treat seasonal affective disorder, especially its winter variant.

It involves the use of a special device that creates bright light of a certain intensity.

In clinical practice, lamps with 10,000 lux illumination are often used, but the specific mode depends on the characteristics of the device and medical recommendations.

According to the NIMH, light therapy may help reduce symptoms of seasonal depression, but the NHS in the UK warns of the limitations of the evidence base for its effectiveness.

It is important to understand that a regular desk lamp is not a complete replacement for a special device.

Light therapy is also not suitable for everyone. Caution is required if you have certain eye conditions, are taking medications that increase sensitivity to light, or have bipolar disorder.

Therefore, it is undesirable to prescribe procedures yourself.

Treatment for seasonal depression may also include psychotherapy and medication, depending on the severity of the condition and individual needs.

How to improve your mood in autumn: a practical plan for a week

It's not necessary to try to change all your habits at once. It's more rational to start with those factors that have the greatest impact on your daily well-being.

A rough plan might look like this:

This is an example of organizing daily life, not a treatment program with guaranteed results.

For one person, the most important thing may be improving sleep, for another, reducing information load or returning to regular physical activity.

How to track mood changes

You can briefly record three indicators for one to two weeks: sleep quality, energy level, and overall well-being.

It is also useful to note events after which mood changes significantly.

For example, a person may notice that after watching the news for a long time, it is more difficult for them to fall asleep, and after a day's walk, they can concentrate more easily at work.

Such observations do not prove a cause-and-effect relationship, but they help to notice individual patterns.

If self-monitoring increases anxiety or turns into obsessive control, it should be abandoned.

Common myths about a bad mood in autumn

Myth 1. In the fall, all people become more depressed.

Seasonal mood swings are not universal. Some people barely notice the psychological difference between the seasons, while others feel even more comfortable in the fall.

Myth 2. Autumn depression is necessarily caused by a lack of vitamin D.

Low vitamin D levels may coexist with seasonal depressive symptoms, but a causal relationship has not been conclusively established. Studies on the effectiveness of supplements for treating seasonal depression have yielded mixed results.

Myth 3. If you work harder, your bad mood will go away.

Being busy sometimes helps to distract from unpleasant experiences, but excessive workload and insufficient rest can increase exhaustion.

Myth 4. Seasonal depression can be cured by walking.

Walking and physical activity can support psychological well-being, but are not a substitute for proper treatment for clinical depression.

Myth 5. If a bad mood repeats itself every year, nothing can be changed.

Seasonal depressive disorder is treatable. The approach may include psychotherapy, light therapy, or medication as indicated.

Conclusion

Autumn mood depends on many factors: natural light, sleep quality, physical activity, social connections, health status, and daily stress.

Habits that seemed harmless in the summer sometimes become more noticeable in the fall due to changes in the length of the day and the usual rhythm of life.

Regular rest, daylight, moderate activity, and a balanced diet can support psychological well-being. However, if depressed mood persists, worsens, or interferes with daily life, it is important not to attribute everything to seasonality and to seek medical attention promptly.

FAQ: frequently asked questions about autumn mood

Why do I always want to sleep in the fall?

Sleepiness can be caused by reduced daylight hours, changes in circadian rhythms, or insufficient or poor-quality sleep. However, persistent fatigue can also occur with anemia, thyroid disease, sleep disorders, depression, and other conditions. If sleepiness is severe or does not go away after adequate rest, medical evaluation is warranted.

Why is there a bad mood in autumn for no apparent reason?

The length of daylight hours, accumulated stress, sleep disturbances, and changes in physical activity can all affect how you feel. There is not always one obvious cause. If depression becomes persistent or is accompanied by a loss of interest in usual activities, a depressive disorder should be ruled out.

How to quickly cheer yourself up in autumn?

A short walk, talking to a loved one, resting, or engaging in moderate physical activity can help temporarily improve your mood. However, there is no one-size-fits-all solution to instantly change your mood. If the cause is chronic stress or depression, short-term measures may not be enough.

Does sunlight really affect mood?

Yes. Natural light is involved in regulating circadian rhythms and can affect sleep and mood. Studies also show a link between daylight and positive mood. However, being outside does not guarantee a cure for depression.

What vitamins should you take in the fall to improve your mood?

There is no universal set of vitamins to improve mood. A lack of individual nutrients can affect well-being, but without an examination it is impossible to establish its cause. Supplements should be used for medical reasons, and not just because of the onset of autumn.

Can autumn depression start in September?

Yes, seasonal depressive symptoms may begin in some people in the fall, particularly in September. However, the month of onset of symptoms alone does not confirm the diagnosis. The doctor assesses the duration, severity, recurrence of the symptoms, and possible other causes.

How long does the autumn blues last?

A short-term mood swing can last for a few days, but there is no universal duration. If symptoms persist for more than two weeks, become more intense, or disrupt daily life, you should see a doctor. For severe symptoms, help should be sought sooner.

Does exercise help with autumn depression?

Physical activity can reduce depressive symptoms and support mental health. Research supports the benefits of walking, running, yoga, and strength training for some people with depression. However, the choice of exercise and its role in treatment depend on the health condition and severity of the illness.

How to distinguish autumn fatigue from depression?

Normal fatigue often improves with rest, although this does not always happen. Depression is characterized by a persistent low mood or loss of interest, which may be accompanied by changes in sleep, appetite, concentration, and self-esteem. Symptoms alone cannot reliably diagnose depression without a medical evaluation.

Can seasonal affective disorder be prevented?

There is no guaranteed way to prevent it. Regular sleep, physical activity, adequate daylight, and maintaining social contacts can be beneficial for overall mental health. For people with confirmed seasonal affective disorder, a doctor may recommend an individualized prevention strategy before an expected period of worsening.

Important: The article is for informational purposes only and is not a substitute for professional medical advice. Self-medication, self-administration of antidepressants, sleeping pills, high doses of vitamins or light therapy can be harmful to health. Before starting any treatment, be sure to consult a doctor. If depressed mood lasts more than two weeks, is accompanied by loss of interest in life or other disturbing symptoms, a medical evaluation is necessary. In case of an immediate threat to life or risk of self-harm, emergency care is required.
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