İzmir weather in September
In September, İzmir has an average high of 29 °C84 °F and an average low of 18 °C64 °F, with about 19 mm0.7 in of precipitation. It is the 4th warmest month of the year and ranks 9th for precipitation.
How September compares with other months
Compared with August, September is 4.1 °C7.3 °F cooler on average and wetter by 16 mm0.6 in. Compared with October, September is 5.1 °C9.1 °F warmer on average and drier by 32 mm1.2 in. Daylight lasts about 12.4 hours around the middle of the month. Average relative humidity is 58% and the average cloud amount 24%.
Is September a good time to visit İzmir?
Yes — September is one of the most comfortable months to visit İzmir by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in September
For İzmir in September, pack light summer clothes such as T-shirts, shorts or light dresses.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| İzmir | 2984 | 1864 | 190.7 |
| Bornova | 3290 | 1762 | 190.7 |
| Aydın | 3493 | 1865 | 190.7 |
| Salihli | 3391 | 1763 | 190.7 |
| Nazilli | 3493 | 1865 | 190.7 |
| Balıkesir | 3085 | 1660 | 311.2 |
| Merkezefendi | 3290 | 1762 | 190.8 |
| Denizli | 3289 | 1762 | 200.8 |
| Uşak | 2882 | 1355 | 210.8 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Aydın, Salihli and Nazilli; cooler: Uşak.
Other months in İzmir
- January12 °C53 °F / 5 °C41 °F
- February13 °C55 °F / 5 °C42 °F
- March16 °C60 °F / 7 °C45 °F
- April20 °C67 °F / 10 °C50 °F
- May25 °C76 °F / 14 °C58 °F
- June30 °C85 °F / 19 °C66 °F
- July33 °C92 °F / 21 °C70 °F
- August34 °C93 °F / 21 °C71 °F
- September29 °C84 °F / 18 °C64 °F
- October23 °C74 °F / 13 °C56 °F
- November18 °C64 °F / 9 °C49 °F
- December13 °C56 °F / 6 °C43 °F
Frequently asked questions
How warm is İzmir in September?
In September the average high in İzmir is 29 °C (84 °F) and the average low is 18 °C (64 °F).
Does it rain a lot in İzmir in September?
On average about 19 mm (0.7 in) of precipitation falls in September; it ranks 9th of the 12 months.
Is September the warmest month in İzmir?
No. The warmest month in İzmir is August, with an average high of 34 °C (93 °F). The coldest month is January, with an average low of 5 °C (41 °F).
How long is the day in İzmir in September?
In the middle of September the day in İzmir lasts about 12.4 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is İzmir in September?
The average relative humidity in September is about 58%. This is a long-term average for the whole day.
How cloudy is İzmir in September?
On average about 24% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.