Why Hair Fall Peaks in September and October (Even in the UAE)
If you're reading this in September or October and your drain looks worse than it did in spring, you are not imagining it, and it's probably not your water. Human hair sheds on a yearly cycle, and the peak lands right about now. Here's the research, why the UAE calendar makes it feel worse, and how to tell seasonal shedding from something that needs a doctor.
KNOWN: A six-year study of over 800 healthy women (Kunz, Seifert and Trüeb, 2009) found the proportion of hairs in the resting (telogen) phase peaks in July, with a smaller peak in April and a low in February. Because resting hairs fall out roughly three months later, visible shedding peaks in late summer and autumn.
LIKELY: In the UAE, the peak coincides with the return from summer travel, the start of the school year, and the hottest tap water of the year, which makes people notice it more and reach for an explanation.
UNPROVEN: That Dubai's climate makes seasonal shedding worse than elsewhere. There's no UAE-specific study; the seasonal pattern is documented in temperate climates and appears to be a general human trait.
What the Research Actually Found
The clearest data comes from a Swiss trichology clinic that tracked 823 healthy women complaining of hair loss over six years using trichograms, a microscopic count of hair roots in their growth or resting phase. The pattern was consistent year after year: telogen (resting) hairs were most numerous in July, with a second, smaller rise in April, and fewest at the start of February.
A hair that enters telogen doesn't fall immediately. It rests for roughly three months, then sheds. So a July peak in resting hairs becomes a visible peak in shed hairs around September and October. A separate analysis of Google search data across several countries found "hair loss" searches also peak in summer and early autumn, which fits.
| Month | What's happening in the follicle | What you see |
|---|---|---|
| February | Fewest hairs in resting phase | Least shedding of the year (about 3 months later, in May) |
| April | Smaller telogen rise | Mild shedding bump around July |
| July | Most hairs in resting phase | Peak shedding in September-October |
| November-January | Cycle resets | Shedding calms |
Timeline derived from Kunz et al., Dermatology, 2009. Individual variation is large.
Why It Feels Worse in the UAE Right Now
Nothing about the biology is Dubai-specific. But the calendar stacks several things on top of the natural peak, and each one gives you a reason to blame something other than the season.
You've just come back from holiday. Many residents spend July and August in Europe or South Asia. Your hair felt great there (different water, cooler rinses, less AC, more time outdoors). You return, the natural shedding peak arrives on schedule, and the contrast makes "it's the water here" the obvious story. It's the most common narrative on r/dubai, and the timing alone explains a lot of it. See why Dubai shower water feels different from Europe.
Tap water is at its hottest. Rooftop tanks have been baking since June. Rinsing with 40°C "cold" water is rougher on scalp and cuticle than any month of the year, see why your cold tap runs hot.
Routine disruption. School term, work ramp-up, travel fatigue. Stress-related shedding runs on its own 2-3 month delay, see relocation shedding, and a stressful June shows up in September too.
Seasonal Shedding vs Something Else
| Seasonal shedding | Worth seeing a dermatologist | |
|---|---|---|
| Pattern | Diffuse, all over the scalp | Receding hairline, widening parting, thinning crown, or patches |
| Duration | Roughly 4-8 weeks, then calms | Continues past 3 months, or worsens |
| Regrowth | Fine new hairs visible along the hairline within weeks | No regrowth, or hairs coming back finer |
| Other symptoms | None | Fatigue, brittle nails, heavy periods, scalp pain or scaling |
| Timing | Same time every year | Any time, often 2-3 months after illness, surgery, childbirth or a big stressor |
What to Do About It
Mostly: wait, and don't panic-buy. Seasonal shedding resolves on its own. A few things are reasonable in the meantime.
✔ Don't wash more often to "clear" the shed hairs; you'll just see them all at once. Two to three washes a week is plenty for most people.
✔ Rinse cooler than the tap wants you to. In September that may mean a bucket filled the night before or a cold final rinse.
✔ Don't start minoxidil or supplements on the strength of a seasonal peak. Give it six weeks; if shedding persists, get ferritin and vitamin D checked, see the blood tests to get first.
✔ If your scalp also itches or feels stripped after showering, that's a separate, chlorine-related symptom a filter can address. It won't change the seasonal count, but it will change how your scalp feels while you wait it out.
There is no published study of seasonal hair shedding in UAE or Gulf residents specifically. The Swiss data is the best available and comes from women; men are assumed to follow a similar pattern but were not in that study. We also cannot quantify how much the September "holiday contrast" effect adds to perceived shedding; that's an inference from resident accounts, not a measurement.
| Question | Honest answer |
|---|---|
| Is it normal to shed more in September and October? | Yes, in most people, most years. |
| Is it the Dubai water? | The timing says no. The biology is the same everywhere. |
| How long does it last? | Usually 4-8 weeks. |
| When should I worry? | If it lasts past 3 months, shows a pattern, or comes with other symptoms. |
FAQs
How many hairs a day is normal?
Commonly quoted at 50-100 per day for a full head of hair, with more on wash days. During a seasonal peak that can rise noticeably for a few weeks without meaning anything is wrong.
Does the summer sun cause the shedding?
The mechanism isn't fully settled. UV exposure and daylight-linked hormonal rhythms are candidates, but the study measured the pattern rather than the cause. Wearing a hat outdoors in summer is sensible regardless.
Will a shower filter stop seasonal shedding?
No. Seasonal shedding is driven by the follicle's internal clock. A filter addresses chlorine at the point of use, which affects scalp comfort and hair texture, not the shedding cycle.
Final Thoughts
The drain in September is a calendar event, not a water event. Give it six weeks, keep your routine steady, and use the time to run the checks that actually matter if it doesn't settle.
Does Dubai Water Really Cause Hair Loss? What Dermatologists Actually Say
Minoxidil, Water Quality or Genetics?
Does Washing Your Hair Less Often Help?
Not a Cure for September. A Better Shower While You Wait.
Chlorine out of the water that touches your scalp, every day.
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