Istanbul weather in September

Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average

Istanbul September weather at a glance

B Good 🙂

In September, Istanbul averages 21.5°C, with typical highs of 26°C and lows of 18.1°C. The historical average is 10 wet days and 72% humidity.

Compared with Seoul in September, it is 1.4°C cooler than Seoul, with 3 fewer wet days.

Istanbul September temperature & humidity

Average21.5°CHigh 26° / low 18.1°

Humidity72%

Wet days10 days32% of days

Day–night range7.9°

Istanbul September rain & wet days

Wet days10 daysHistorical monthly average

Share of wet days32%Not a forecast probability

Pack a compact umbrella. Keep an indoor stop available between outdoor activities.

What to wear in Istanbul in September

Choose breathable summer clothes and pack sun protection. Showers are possible, so a compact umbrella is useful.

DaytimeBreathable short sleeves, hat and sunscreen · average high 26°C
Morning & eveningLight layer for air-conditioned rooms · average low 18.1°C
FootwearComfortable walking shoes; quick-dry footwear for rainy days.

Useful extras

Breathable T-shirtsHat and sunglassesCompact umbrella

Choose a destination packing checklist →

Packing essentials

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Travel compression packing pouches
코멧 여행용 압축 파우치 4종 세트 Travel plug adapter
에너자이저 PD 45W 여행용 멀티 어댑터, 화이트 Compact folding umbrella
솔리앤 초경량 UV차단 3단 자동우산 Inflatable travel neck pillow
마이워니 여행용 에어 목베개

Istanbul September sunrise & sunset times

2026 September · Local time (Europe/Istanbul)

Sunrise on the 15th06:44

Sunset on the 15th19:14

Daylight duration12h 29m

Start, middle and end of the month
Date	Sunrise	Sunset	Daylight
2026-09-01	06:31	19:37	13h 6m
2026-09-15	06:44	19:14	12h 29m
2026-09-30	06:59	18:48	11h 49m

For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.

Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup

Istanbul travel updates

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Istanbul sightseeing camerasIstanbul Metropolitan Municipality · Camera directory

Check the camera timestamp at the source.

Istanbul travel essentials

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Best months to visit Istanbul

Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.

J F M A M J J A S O N D

ColdHot

September weather by year

September 202421.8°15 wet days, 75% humidity

September 202521.3°4 wet days, 70% humidity

Daily weather in 2025

Daily high and low temperatures; blue labels show precipitation

130°21°

231°20°

331°21°

429°22°

528°23°

623°19°12mm

724°19°

825°18°

926°18°

1028°17°

1127°20°

1226°20°

1326°20°

1425°20°

1525°19°

1627°16°

1728°17°

1822°17°2.7mm

1923°18°

2024°15°

2125°17°

2226°19°

2327°17°

2426°15°

2524°18°

2622°18°1.7mm

2720°17°

2821°16°

2918°15°9.2mm

3019°14°

Frequently asked questions

What is Istanbul weather like in September?

In September, Istanbul averages 21.5°C, with typical highs of 26°C and lows of 18.1°C. The historical average is 10 wet days and 72% humidity. Our weather-comfort rating for this month is good.

Does it rain a lot in Istanbul in September?

There are about 10 wet days in September. A compact umbrella is still useful.

What should I wear in Istanbul in September?

Choose breathable summer clothes and pack sun protection. Showers are possible, so a compact umbrella is useful.

What are the best months to visit Istanbul?

Recent weather data rates April, May, June, July among the more comfortable months.

Where can I check Istanbul weather in September in real time?

Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.

What time are sunrise and sunset in Istanbul in September?

On 2026-09-15, calculated sunrise is 06:44 and sunset is 19:14 in local time (Europe/Istanbul). Times vary by date and terrain.

Istanbul weather by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

More India, Middle East & Central Asia destinations in September

Delhi Mumbai Jaipur Goa Kathmandu Pokhara Colombo Maldives Dubai Abu Dhabi Doha Cappadocia Antalya Tashkent Samarkand Almaty Cairo Marrakech All destinations →

Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations