Last updated: August 27, 2025
In September, Iznik, Turkey, experiences a diverse climate that transitions from the remnants of summer heat to the cooler embrace of autumn. Temperatures can reach a maximum of 38°C (101°F), while the average settles around a comfortable 21°C (69°F), providing a delightful range for all outdoor activities. However, cool nights can drop to a brisk 6°C (43°F), reminding visitors to pack layers. The month sees a modest precipitation amount of 31 mm (1.2 in) over approximately 7 days, contributing to the area's lush landscapes. With a pleasant 60% humidity, the air feels refreshing, making September a perfect time to explore Iznik's rich cultural heritage and breathtaking scenery.
As summer gracefully transitions into autumn, September in Iznik, Turkey, offers a delightful mix of warm temperatures and mild breezes. With a minimum temperature of around 6°C (43°F), nights start to cool down, but the days are still pleasantly warm, boasting an average of 21°C (69°F). Sun-kissed afternoons can reach a sweltering 38°C (101°F), making it ideal for outdoor activities and exploring the region's rich history. This month marks a subtle shift, with temperatures beginning to dip from the sweltering highs of the summer, yet still holding onto that warmth, inviting visitors to soak in the scenic beauty of this historic town before the crispness of autumn fully sets in.
September in Iznik, Turkey, marks a gentle transition in precipitation patterns as summer fades. With 31 mm (1.2 in) of rainfall over 7 days, this month sees a noticeable uptick compared to the drier summer months of July and August, which recorded only 37 mm (1.5 in) and 19 mm (0.7 in) respectively. This shift is indicative of the region’s approach to autumn, where the once parched landscapes begin to receive more moisture, paving the way for lush scenery ahead. As the days grow shorter and temperatures cool, September lays the groundwork for the wetter months to come, serving as a gentle reminder of nature's cyclical rhythms.
In September, Iznik, Turkey, experiences a notable shift in humidity, with levels averaging around 60%. This marks a gradual rise from the drier months of July and August, which see humidity plummet to their lowest points at 63% and 55%, respectively. As the summer heat wanes, September brings a welcome reprieve, hinting at the onset of autumn. This transitional month retains a balance, offering a refreshing change that prepares the region for the increased moisture that follows in October with 73% humidity, before the winter months bring even higher levels. Overall, the trend showcases a clear seasonal rhythm in Iznik’s climate, where the lingering warmth of summer meets the cool embrace of fall.
In September, Iznik, Turkey, continues to experience a very high UV Index of 8, with a burn time of just 15 minutes. This marks a slight decline from the peak summer months of July and August, which held steady at the maximum value of 10. However, the UV levels remain significantly elevated as the region transitions into fall, reflecting a gradual decrease in sunlight intensity compared to the scorching summer. As such, residents and visitors should remain vigilant about sun protection during outdoor activities. To understand more about the UV Index trends throughout the year, check out Iznik UV Index.
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In September, Iznik, Turkey, enjoys a splendid 343 hours of sunshine, marking a delightful transition from the peak summer months. This figure reflects the gradual decrease in sunlight that begins after July's impressive 424 hours. As the vibrant summer fades, September still offers a generous amount of sun, significantly more than the cooler months ahead, such as October with its 302 hours and November's 254 hours. This trend of diminishing daylight from the summer zenith into the autumnal embrace highlights Iznik as a perfect retreat for those seeking warmth and brightness before the winter sets in. Visitors can relish the lingering warmth while basking in the rich history and stunning landscapes this charming town has to offer, making September an ideal month for exploration.
As summer transitions into autumn, September in Iznik, Turkey, offers a delightful blend of warmth and sun. With a 53% chance of sunny weather, this month strikes a balance between the vibrant sunshine of August, which boasts a remarkable 76% chance, and the cooler, cloudier days of October at 44%. This moderate probability suggests that visitors can still enjoy pleasant, sunny days, making September an excellent time for outdoor activities and exploring the historical beauty of Iznik. As the heat gradually subsides, the comfortable climate is perfect for soaking in both the natural scenery and cultural richness of this enchanting region.
As September arrives in Iznik, Turkey, the daylight hours begin to gradually wane, with 12 hours of sunlight illuminating the landscape. This marks a gentle transition from the vibrant warmth of summer, where July and August enjoy a peak of 14 hours of daylight. Notably, September's daylight duration reflects a consistent pattern throughout the year, starting with shorter days in January at just 9 hours and gradually increasing to a summer high before tapering off again in the fall. This rhythm not only signifies the changing seasons but also invites a beautiful interplay of light and shadow across Iznik's stunning scenery, setting the stage for autumn's arrival.
As the summer fades into autumn, September in Iznik, Turkey ushers in a gentle breeze, with an average wind speed of 2.2 m/s (5 mph), maintaining the same refreshing currents felt in July and August. This steady wind offers a delightful reprieve from the lingering warmth of the summer months, creating an ideal atmosphere for outdoor activities and exploration. Interestingly, the wind speeds throughout the year seem to follow a subtle pattern, peaking in late summer and returning to a more moderate pace as autumn progresses, reflecting the region's serene transition into cooler weather. Whether you're wandering through ancient sites or enjoying the breathtaking landscapes, September's wind provides a perfect companion for your adventures.
Weather in Iznik varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Iznik, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather conditions. September is characterized by relatively warm temperatures, with an average of 21°C (69°F) and a maximum reaching up to 38°C (101°F), while experiencing moderate humidity at 60%. In contrast, January brings colder weather with temperatures plunging to a minimum of -15°C (5°F) and an average of just 4°C (39°F). January is also wetter, with 84 mm (3.3 in) of precipitation spread over 12 days and considerably higher humidity at 84%. For a closer look at January conditions, check out Iznik weather in January.
September and February present quite contrasting weather conditions. In September, temperatures range from a mild minimum of 6°C (43°F) to a scorching maximum of 38°C (101°F), with an average of 21°C (69°F). The month sees relatively low precipitation at 31 mm (1.2 in) over about 7 days, accompanied by a comfortable humidity level of 60%.
In stark contrast, February experiences much colder temperatures, with a minimum of -10°C (14°F) and a maximum of 22°C (72°F), averaging just 6°C (43°F). Precipitation is heavier during this month, totaling 59 mm (2.3 in) spread over 11 days, and humidity rises to a high of 84%. For more specific details on February weather, you can visit Iznik weather in February.
September experiences significantly warmer temperatures, with averages around 21°C (69°F) and maximums soaring up to 38°C (101°F). In contrast, March presents a cooler climate, with an average temperature of 8°C (46°F) and maximums reaching only 23°C (74°F). Additionally, September sees less precipitation at 31 mm (1.2 in) over about 7 days, while March is markedly wetter with 84 mm (3.3 in) occurring over 13 days. Humidity levels are also higher in March, at 83%, compared to September's 60%. For more detailed information about March weather, visit Iznik weather in March.
In September, the weather typically features a broader temperature range, with minimums around 6°C (43°F) and maximums soaring up to 38°C (101°F), resulting in an average of 21°C (69°F). This month experiences relatively low precipitation at 31 mm (1.2 in) over approximately 7 days and a comfortable humidity level of 60%. In contrast, April brings cooler temperatures, with minimums dropping to -1°C (31°F) and maximums peaking at 27°C (82°F), averaging just 12°C (53°F). Precipitation is higher in April at 55 mm (2.2 in) over about 10 days, accompanied by a notable increase in humidity at 76%. For more details on April conditions, you can check Iznik weather in April.
In comparing the weather between September and May, it's evident that September tends to be warmer, with average temperatures reaching 21°C (69°F) and a maximum of 38°C (101°F), while May has a cooler average of 17°C (63°F) and a maximum of 34°C (94°F). Additionally, September experiences less precipitation, averaging 31 mm (1.2 in) over 7 days, compared to May, which sees a higher total of 69 mm (2.7 in) over 11 days, indicating that May is generally wetter. Humidity levels also differ, with May reaching 77%, creating a more humid environment, while September's humidity is lower at 60%. For more details on May weather, check out Iznik weather in May.
September and June offer distinct weather characteristics that can greatly influence outdoor activities. In September, temperatures range from a minimum of 6°C (43°F) to a comfortable average of 21°C (69°F), reaching a maximum of 38°C (101°F). The month sees moderate precipitation, with 31 mm (1.2 in) spread over 7 days and a humidity level of 60%. In contrast, June features slightly milder temperatures, with a minimum of 8°C (47°F) and an average of 21°C (70°F), peaking at 34°C (93°F). However, it experiences significantly higher rainfall at 79 mm (3.1 in) across 13 days and a higher humidity level of 70%. For more detailed information, check out Iznik weather in June.
When comparing the weather in September and July, September tends to be cooler, with minimum temperatures dropping to 6°C (43°F) compared to July’s minimum of 13°C (55°F). The average temperature in September is 21°C (69°F), while July enjoys a warmer average of 24°C (75°F). Despite having slightly lower maximum temperatures, September can see highs reaching up to 38°C (101°F), just slightly above July's peak of 37°C (99°F). In terms of precipitation, September receives 31 mm (1.2 in) over 7 days, while July has a bit more rain with 37 mm (1.5 in) across 6 days. Humidity levels remain comparable, with September at 60% and July at 63%. For more detailed insights on July’s weather, you can check Iznik weather in July.
In comparing the weather of September and August, September sees a noticeable drop in the minimum temperature, reaching as low as 6°C (43°F) compared to August's minimum of 13°C (56°F). However, the average maximum temperature remains similar, with both months peaking at around 38°C (100-101°F). September experiences slightly more precipitation, totaling 31 mm (1.2 in) over 7 days, while August has only 19 mm (0.7 in) with precipitation on just 3 days. Humidity levels are also slightly higher in September at 60%, compared to 55% in August. For those interested in more details about August weather, please visit Iznik weather in August.
In September, the weather is typically warmer, with average temperatures around 21°C (69°F) and maximum highs reaching up to 38°C (101°F). The month experiences relatively low humidity at 60% and receives about 31 mm (1.2 in) of precipitation over an average of 7 days. In contrast, October sees a noticeable drop in temperatures, with an average of 16°C (61°F) and maximums reaching 35°C (95°F). This month is also wetter, with precipitation increasing to 45 mm (1.8 in) over 8 days and humidity rising to 73%. For a more detailed look at October's weather, you can check Iznik weather in October.
In September, the weather is generally warm with average temperatures around 21°C (69°F) and a maximum of 38°C (101°F), making it ideal for outdoor activities. Precipitation is relatively low at 31 mm (1.2 in) over about 7 days, with a humidity level of 60%. In contrast, November sees a significant drop in temperatures, with a minimum of -1°C (30°F) and an average of 11°C (52°F), while maximum temperatures reach only 26°C (79°F). The month also experiences increased rainfall with 48 mm (1.9 in) over approximately 8 days and higher humidity at 82%. For more details on November weather, check out Iznik weather in November.
September weather is characterized by warmer temperatures, with average highs reaching 21°C (69°F) and peaks that can soar to 38°C (101°F). The month experiences relatively low precipitation, totaling 31 mm (1.2 in) over about 7 days, and a comfortable humidity of 60%. In contrast, December brings a significant drop in temperatures, with average highs of only 7°C (45°F) and lows dipping to -5°C (23°F). This month also sees increased rainfall, amounting to 97 mm (3.8 in) across approximately 13 days, along with higher humidity levels at 85%. For those interested in more specifics, you can check out Iznik weather in December.
As summer begins to wane, September offers a delightful transition in Iznik's weather. With pleasantly warm days peaking at a comfortable temperature and cooler nights providing a refreshing contrast, this month stands out from the sweltering heat of the preceding months. Even though the humidity remains steady at around 60%, the significantly reduced precipitation—spreading over just a week—ensures plenty of opportunities for outdoor exploration. Overall, September is a charming time to visit, with more temperate conditions inviting both adventure and relaxation. For a deeper dive into the year-round weather patterns, visit Iznik Climate.