Istanbul in September
goodbusy · 6th of the 12 months that clear the bar
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The numbers
| Daily high | 24°C |
|---|---|
| Nightly low | 19°C |
| Feels like, afternoon | 22°C |
| Rainy days | 6 · 54 mm |
| Humidity | 69% |
| Sunshine | 11.1 h/day |
| Daylight | 12.2 h/day |
| Crowds | 65 / 100, higher is quieter |
Ten-year averages for this calendar month. A rainy day is one with at least 2 mm.
What September is known for
- Peak season — This period is the warmest with the most sunshine, appealing to tourists seeking summer experiences.
- Shoulder season — Temperate weather with decreasing crowds after summer high season.
Written by a language model from the climate figures; the numbers above are measured and win where the two disagree.
What to pack
- Sun protection: about 11 hours of sunshine a day.
Each line is a threshold over the ten-year figures above, not advice from anywhere else.
Before you go
| Cost of living | cheap — prices run about 41% of the United States' (World Bank, 2025) |
|---|---|
| Currency | Turkish lira |
| Languages | Turkish |
| Plugs | Type C and F, 230 V |
| Driving | On the right |
| Emergency | 112, 177 |
| Calling code | +90 |
| Travel advice | avoid all travel to parts — UK Foreign Office, updated 2026-09-21 |
Health. Before you travel check that: your destination can provide the healthcare you may need you have appropriate travel insurance for local treatment or unexpected medical evacuation This is particularly important if you have a health condition or are pregnant. Emergency medical number Dial 112 and ask for an ambulance. Contact your insurance or medical assistance company promptly if you’re referred to… More.
Facts from Wikidata (CC0), the UK Foreign Office (Open Government Licence) and the World Bank, refreshed 2026-09-23. The advisory is written for British travellers; entry rules depend on your passport.
The other months at Istanbul
- January ok
- February ok
- March ok
- April good
- May sweet spot
- June sweet spot
- July sweet spot
- August sweet spot
- September
- October good
- November ok
- December ok
← August · All twelve months at Istanbul · October →
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