Weather in İzmir in September

Prime time. If you get to pick your dates, September is the one. Highs average 29.4 °C, lows 18.4 °C, and rain falls on 3 days — nothing in the month is working against you.

September ranks 4 of 12 in İzmir: past the worst of the year but short of May, which is the month to book if the dates are open.

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 29.4 °C days and 18.4 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 14 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest September day reached 39.4 °C and the coldest night fell to 11.9 °C, and the wettest single day dropped 33 mm — roughly 174% of the month's rain in one day.

This is the volatile part. September rainfall has ranged from 0 mm to 62 mm across the twenty years measured — a 62 mm spread around an average of 19 mm. The average is real but almost no individual September looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 11.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 58%.

How September sits in the year

The month is on the way down: 4.5 °C cooler than August, with October dropping another 5.4 °C. The first week and the last are not the same trip.

Daylight in September

12.5 hours of daylight, losing 1.2 hours across the month. That is between İzmir's extremes of 14.8 and 9.5 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 28.9 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

September in İzmir versus nearby

If İzmir is one option among several, the nearby comparison is worth making. Ródos is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Bursa is close enough to be a coin toss — within a degree on temperature, 3 days more rain.

So: September is effectively as good as it gets here — 6 points behind May, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in İzmir

See all twelve months in İzmir, or where else to go in September.