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Do You Really Need Sunscreen for a Dhaka Commute?

Yes. In Dhaka the midday UV index sits around 8 to 12 for much of the year, which is “very high” to “extreme”. Plenty of UV gets through on cloudy days, and UVA passes through bus and car windows. Thirty to sixty minutes on a rickshaw every day adds up to hundreds of hours of sun a year, which deepens dark spots and melasma. SPF 30+ with PA+++ plus an umbrella or cap works best.

Written by the Oliareen editorial teamDermatologist review: pendingLast updated: 6 November 2026How we write

Why Dhaka sun deserves attention

Bangladesh sits near the Tropic of Cancer, so the sun is high for most of the year. On the WHO scale a UV index of 8 to 10 is “very high” and 11+ is “extreme”. Brown skin does not burn easily, but sun darkens it, deepens old marks and worsens melasma. A little sun every day adds up to a lot over a year.

Cloudy days and glass windows

  • A large share of UV passes through light cloud; WHO says up to about 80%. Feeling cool does not mean UV is low.
  • Ordinary bus, CNG or car glass blocks most UVB but lets much UVA through, and UVA plays a big part in spots and melasma.
  • The same goes for sitting beside an office window.

How much and how to apply

  • For face and neck, roughly two finger-lengths. Using less means you do not get the SPF on the label.
  • Apply 15 minutes before you leave; do not forget ears, neck and the backs of your hands.
  • SPF 30 or higher with PA+++ or PA++++ (or “broad spectrum”).
  • When outdoors, reapply every 2 hours and after wiping sweat or washing your face.

A simple commute plan

  • Morning: sunscreen after moisturizer, then makeup if you wear it.
  • Keep a small bottle in your bag; reapply at lunch or before the trip home.
  • On a rickshaw use an umbrella or the hood, on a bike a visor, on foot a cap or orna or hijab to shade the face.
  • Sunglasses protect both the eyes and the skin around them.
  • At night, one gentle wash removes sunscreen, sweat and dust.

Common mistakes

  • Using it only on bright sunny days.
  • Spreading one drop over the whole face.
  • Wiping sweat off with a handkerchief and never reapplying.
  • Counting SPF foundation or powder as sunscreen; people apply so little that protection is low.
  • Thinking a vitamin C serum replaces sunscreen.

What the evidence says

Daily broad-spectrum facial sunscreen for one year improved spots, texture and evenness of tone (Randhawa 2016; a small, manufacturer-funded study). The Dhaka UV figures come from our research base and the WHO UV index scale; they change by day and season. A weather app shows the day's UV index.

Questions people ask

Do I need sunscreen on a cloudy day?

Yes. A large share of UV gets through light cloud. Heavy dark cloud or rain lets in less, but the sun can come out during the day.

Does brown skin need less sunscreen?

Brown skin burns less, but sun brings more dark spots, melasma and uneven tone, so it needs the same amount of sunscreen.

How do I reapply over makeup?

Blot sweat with a tissue, then press a thin layer of sunscreen on lightly, or use a spray or stick. SPF powder only helps; it does not give full protection.

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Sources

  1. World Health Organization — Ultraviolet radiation fact sheet
  2. WHO. Global Solar UV Index: A Practical Guide (2002)
  3. American Academy of Dermatology — How to apply sunscreen
  4. Diffey B. When should sunscreen be reapplied? BMJ 2002
  5. Randhawa M et al. Daily use of a facial broad-spectrum sunscreen over one year. Dermatol Surg 2016
  6. NHS — Sunscreen and sun safety