14-day forecast — Istanbul
Updated every hour
Sat · Today · 1 Aug
Clear
+27°
+22°
4%
Sun · Tomorrow · 2 Aug
Clear
+28°
+23°
6%
Monday · 3 Aug
Clear
+31°
+23°
5%
Tuesday · 4 Aug
Clear
+31°
+23°
3%
Wednesday · 5 Aug
Clear
+33°
+24°
2%
Thursday · 6 Aug
Clear
+30°
+23°
4%
Friday · 7 Aug
Clear
+32°
+24°
5%
Saturday · 8 Aug
Clear
+31°
+24°
4%
Sunday · 9 Aug
Clear
+33°
+24°
3%
Monday · 10 Aug
Clear
+31°
+24°
4%
Tuesday · 11 Aug
Clear
+29°
+25°
6%
Wednesday · 12 Aug
Clear
+28°
+23°
7%
Thursday · 13 Aug
Clear
+27°
+22°
3%
Friday · 14 Aug
Clear
+27°
+22°
3%
About Istanbul
Turkiets metropol på två kontinenter vid Bosporen.
CountryTurkey
RegionIstanbul
ContinentEurope
Time zoneEurope/Istanbul (+03:00)
Latitude41.0082°
Longitude28.9784°
Air qualityFair (EAQI 32)
Climate in Istanbul in September
Normals 8 years · best time to visit · Open-MeteoBest time to visit Istanbul: April–October. With perfect weather, September is a recommended month to visit.
| August | September | October | |
|---|---|---|---|
| Average temperature | ▼ 25°C | 21°C | ▼ 17°C |
| Highest temperature | ▼ 30°C | 26°C | ▼ 21°C |
| Lowest temperature | ▼ 21°C | 18°C | ▼ 14°C |
| Precipitation | ▲ 19 mm | 44 mm | ▲ 55 mm |
| Days with precipitation | ▲ 3 d | 8 d | ▼ 7 d |
| Humidity | ▲ 65% | 72% | ▲ 76% |
| Sunshine hours per day | ▼ 12,6 h | 10,9 h | ▼ 8,6 h |
| Cloud cover | ▲ 8% | 13% | ▲ 23% |
| UV index (midday) | ▼ 10 | 7 | ▼ 5 |
| Day length | 13:46 | 12:28 | 11:06 |
| Our rating | Perfect | Perfect | Good |
Temperature day by day in September mean + moving average
Precipitation day by day in September mm
UV index day by day in September midday value, clear-sky
Climate normals calculated from Open-Meteo (ERA5 archive 8 years, sea temperature Marine API). UV estimated from solar elevation.
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Data source
Global weather models — international forecasts
The weather for Istanbul is based on global weather models (ECMWF, GFS) and national meteorological institutes around the world. Forecasts update every hour; current measurements every 15 minutes. For destinations with a larger time difference from Sweden, local time is shown above.