September weather forecast
Izmir, Turkey

With the arrival of September, summer begins to fade in Izmir, making way for the pleasant autumn season. As temperature moderates, dipping to a range between 18.7°C (65.7°F) to 29.1°C (84.4°F), a reprieve from the sweltering summer heat is in sight. An increase in the rainfall to 15mm (0.59") hints at the changing season. Despite the conclusion of the summer season, September continues to retain a warm afterglow, infusing the city with a mild, agreeable climate. As autumn gradually takes hold, the city transitions into a phase of quieter weather, perfect for exploring the culinary and cultural delights of Izmir.

Temperature

September's arrival in Izmir coincides with a soft drop in the average high-temperature, subtly decreasing from August's tropical 32.9°C (91.2°F) to a warm 29.1°C (84.4°F). During September, the average low-temperature is a refreshing 18.7°C (65.7°F).

Heat index

The heat index in September is calculated to be a tropical 30°C (86°F). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.

Humidity

In Izmir, the average relative humidity in September is 53%.

Rainfall

In Izmir, in September, it is raining for 2 days, with typically 15mm (0.59") of accumulated precipitation. Throughout the year, in Izmir, there are 77.5 rainfall days, and 690mm (27.17") of precipitation is accumulated.

Sea temperature

In Izmir, the average seawater temperature in September is 23.8°C (74.8°F).
Note: For someone not comfortable with cold, swimming in 23.8°C (74.8°F) waters might be a stretch. However, with favorable conditions like abundant sunshine, mild wind, and warm air temperatures, the experience can be improved. And while wetsuits are not a must, they can be considered.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 06:41 and sunset at 19:41. On the last day of September, in Izmir, sunrise is at 07:06 and sunset at 18:55 +03.

Sunshine

The average sunshine in September in Izmir is 10h.

UV index

In Izmir, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.