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Why Do I Feel Lazy on Cloudy Days?

Published in Hormone & Weather 3 mins read

You likely feel lazy on cloudy days due to a shift in your body's hormone production.

The Science Behind Cloudy Day Sluggishness

When the sky is overcast and daylight hours are shorter, a natural physiological response occurs within your body. This response is primarily driven by changes in the production of two key hormones: serotonin and melatonin. Let's break down how these hormonal shifts affect your energy levels:

  • Reduced Serotonin: Sunlight exposure is crucial for the production of serotonin, a neurotransmitter associated with feelings of well-being and alertness. On cloudy days, the lack of bright light leads to less serotonin production, contributing to feelings of lethargy.
  • Increased Melatonin: On the other hand, the absence of bright light increases the production of melatonin. Melatonin is a hormone that regulates the sleep-wake cycle, promoting feelings of sleepiness and relaxation. The higher melatonin levels can make you feel drowsy and less motivated to be active.


How Light Affects Hormones

Here's a breakdown in a more digestible format:

Factor Sunny Days Cloudy Days Impact
Sunlight High Low Key for hormone production
Serotonin High Low Mood, Alertness
Melatonin Low High Sleepiness, Relaxation


It's Not All Doom and Gloom

The good news is that while melatonin's effects can make you feel tired, they aren't irresistible. Many people still manage to get their tasks done, even on those dreary fall days.

What Can You Do?

While you can’t control the weather, here are a few things you can do to combat the cloudy-day sluggishness:

  • Maximize Indoor Light: Even if the sun isn't shining, keep your indoor lights bright. Consider using daylight lamps if you struggle with low energy during darker months.
  • Get Moving: Even a short walk or some stretching can help boost energy levels by increasing blood flow and releasing endorphins.
  • Maintain a Consistent Sleep Schedule: Stick to a regular sleep-wake cycle to regulate your body’s natural clock.
  • Eat Well: Choose nutritious foods that provide sustained energy, avoiding sugary snacks that cause energy crashes.


Ultimately, understanding why you feel lazy on cloudy days helps you proactively manage these feelings. It's a normal biological response to the lack of sunlight, and there are practical steps you can take to counteract the effect of reduced serotonin and increased melatonin.

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