Last updated: August 27, 2025
September in Izmit, Turkey showcases a wide temperature range, with maximums soaring up to 36°C (97°F) and dipping to a cool 7°C (44°F) at night. The average temperature settles comfortably at 20°C (68°F), making it an ideal time for outdoor activities. While residents enjoy the warmth, they can also expect 51 mm (2.0 in) of rainfall over approximately 9 days, contributing to a humidity level of around 60%. This blend of warmth and occasional showers makes September a month of transition, where summer's warmth lingers just before the onset of autumn.
As summer transitions into autumn, Izmit, Turkey experiences a notable change in temperatures during September. With minimums dropping to a comfortable 7°C (44°F) and an average of 20°C (68°F), the month offers a refreshing break from the heat of August. However, the mercury still reaches a steamy maximum of 36°C (97°F), allowing for warm, sunny days ideal for outdoor activities. This blend of warm highs and cooler nights creates a pleasant atmosphere, making September a lovely time to explore the vibrant landscapes of Izmit, while also hinting at the approaching fall chill. Overall, it's a month of transition that perfectly captures the comforts of late summer while ushering in the early signs of autumn.
September in Izmit, Turkey, marks a transitional phase in the precipitation pattern, witnessing an average of 51 mm (2.0 in) of rainfall over 9 days. This amount signifies a gentle increase from the arid conditions of August, when only 29 mm (1.2 in) fell over a mere 5 days. As summer wanes, the wet days gradually return, preparing the landscape for the wetter months ahead. While September’s rainfall is notably lower than the heavier months of January and December, it sets the stage for the upcoming autumn, hinting at the re-emergence of more frequent precipitation and offering a respite from the summer heat. This subtle shift in weather underscores Izmit's climatic rhythm, as it transitions into the wetter, cooler fall season.
In September, Izmit, Turkey experiences a notable transition in humidity levels, settling at around 60%. This marks a slight uptick from the summer months, where humidity dipped to its lowest point of 55% in August. As the seasons shift, the air begins to feel heavier, hinting at the unfolding of autumn. The humidity starts to rise again, aligning more closely with the year’s earlier months, specifically from April to June, where levels hovered between 70% and 76%. Overall, September serves as a bridge between the warm, dry summer and the more humid conditions that typify the fall months, setting the stage for the wetter days ahead.
In September, Izmit experiences a UV Index of 7, indicating a high level of UV radiation and a burn time of just 25 minutes for unprotected skin. This marks a noticeable dip from the peak summer months, where the index reached 10 in July and June, reflecting the transition towards autumn. As the season changes, the UV exposure remains elevated compared to earlier months, such as March and April, when the index hovered between 6 and 8. To ensure safe outdoor activities, it's essential to remain vigilant and take protective measures. For more detailed insights on UV levels, visit Izmit UV Index.
UV Risk Categories
September in Izmit, Turkey, delivers a delightful culmination of summer's warmth, basking in 341 hours of sunshine. This month transitions smoothly from the peak summer days of July and August, where daylight reaches impressive highs of 416 and 394 hours, respectively. As autumn approaches, sunshine begins to wane, yet September still offers a generous amount compared to the chill of October and the creeping clouds of later months. The trend shows that as the year progresses, sunlight gradually decreases, with January resting at a modest 161 hours. However, September stands out as a golden bridge between summer and fall, inviting locals and visitors alike to soak in the lingering warmth while it lasts.
As September unfolds in Izmit, Turkey, the likelihood of basking in sunny weather remains robust, with a 48% chance of clear skies. This places it comfortably in the middle of the spectrum for the year. Following the summer months, which boast peak sunshine probabilities at 63% in July and 68% in August, September signals the gradual transition into autumn, offering a delightful blend of warm days without the intensity of peak summer heat. Compared to the earlier months of the year, where sunshine is less predictable—with January at a mere 26%—September emerges as a favorable time for outdoor activities, showcasing a lovely mix of lingering summer warmth and the crispness of the approaching fall.
As September unfolds in Izmit, Turkey, the day begins to shorten, offering about 12 hours of daylight. This marks a gentle transition from the vibrant light of summer, where June peaked at 15 hours, through July and August, which still maintained significant sunlight at 14 and 13 hours, respectively. As the days grow shorter, the daylight duration dips steadily into autumn, reminiscent of the 11 hours seen in October and the 9 hours in the depths of winter by December. This rhythmic ebb and flow of daylight throughout the year paints a vivid picture of the changing seasons, inviting residents and visitors alike to embrace the unique beauty each month brings.
As summer transitions to autumn in Izmit, Turkey, September stands out with a noticeable increase in average wind speed, peaking at 2.5 m/s (6 mph). This gentle breeze, stronger than its predecessors in the warmer months, hints at the changing seasons and offers a refreshing contrast to the sultry summer air. Throughout the year, wind speeds remain relatively stable, typically hovering around 2.2 m/s (5 mph). However, September's uplift suggests a promising shift in the atmosphere, inviting locals and visitors alike to enjoy the cool embrace of autumn while the winds whisper of new beginnings.
Weather in Izmit varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Izmit, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is typically warm, with temperatures ranging from a minimum of 7°C (44°F) to an average of 20°C (68°F) and highs reaching up to 36°C (97°F). The month experiences moderate precipitation with 51 mm (2.0 in) falling over about 9 days, along with a humidity level of 60%. In contrast, January brings much colder conditions, with temperatures dropping to a minimum of -14°C (7°F) and averaging around 4°C (39°F), while highs reach up to 20°C (68°F). This month is characterized by significantly higher precipitation of 108 mm (4.3 in) across approximately 13 days, and humidity levels rise to 84%. For a closer look at January weather specifics, visit Izmit weather in January.
Comparing the weather in September and February reveals significant contrasts. September typically boasts a mild average temperature of 20°C (68°F) with maximums reaching up to 36°C (97°F), making it a warm month. In contrast, February's temperatures are much cooler, averaging around 6°C (42°F) and dipping to lows of -11°C (12°F). Alongside the cooler temperatures, February experiences higher precipitation levels, with an average of 85 mm (3.4 in) falling over 14 days, compared to September's 51 mm (2.0 in) over 9 days. Additionally, February's humidity is notably higher at 84%, compared to September's 60%, contributing to a more damp and chilly atmosphere. For more detailed information about February weather, you can refer to Izmit weather in February.
September and March display notable differences in weather patterns. In September, temperatures can reach a maximum of 36°C (97°F), with an average of 20°C (68°F) and minimal precipitation of 51 mm (2.0 in) over about 9 days, resulting in a humidity level of around 60%. In stark contrast, March experiences much cooler conditions, with temperatures ranging from a low of -7°C (19°F) to a high of 23°C (74°F), coupled with significantly higher precipitation of 102 mm (4.0 in) across approximately 14 days, and humidity levels rising to 83%. For a more detailed look at March weather in Izmit, you can visit Izmit weather in March.
When comparing the weather in September and April, notable differences arise in temperature and humidity. September features a broader temperature range, with minimums of 7°C (44°F) and maximums soaring to 36°C (97°F), resulting in an average temperature of 20°C (68°F). In contrast, April presents a cooler climate, with temperatures ranging from a minimum of 0°C (31°F) to a maximum of 27°C (80°F) and an average of 11°C (52°F). Additionally, April experiences higher humidity at 76%, compared to September’s 60%. Precipitation is also more prevalent in April, with 75 mm (2.9 in) over 12 days, whereas September receives 51 mm (2.0 in) spread across 9 days. For more specifics on April weather, visit Izmit weather in April.
When comparing the weather in September and May, September tends to be warmer with average temperatures reaching 20°C (68°F) and maximums soaring up to 36°C (97°F), whereas May has a cooler average of 16°C (62°F) and max temperatures of 33°C (91°F). Precipitation is more prevalent in May, with 90 mm (3.5 in) falling over 13 days, compared to September's 51 mm (2.0 in) over 9 days. Additionally, humidity levels are higher in May at 77%, in contrast to 60% in September. For more details on May weather, you can check Izmit weather in May.
In comparing the weather of September and June, both months exhibit similar average temperatures around 20°C (68°F), but their extremes differ significantly. September experiences a wider temperature range with minimums dipping to 7°C (44°F) and maximums reaching as high as 36°C (97°F), whereas June's temperatures are slightly milder, with a minimum of 8°C (47°F) and a maximum of 32°C (89°F). Additionally, September receives less precipitation, accumulating only 51 mm (2.0 in) over about 9 days, compared to June, which sees a heftier 103 mm (4.1 in) across about 15 days. Humidity levels are also higher in June at 70%, compared to 60% in September, making June feel more humid overall. For more detailed insights into the weather patterns, you can check out Izmit weather in June.
In comparing the weather of September and July, September generally experiences a broader temperature range, with minimums dropping to 7°C (44°F) and maximums soaring to 36°C (97°F), resulting in an average of 20°C (68°F). In contrast, July maintains milder temperatures, with minimums at 13°C (55°F) and maximums reaching 34°C (93°F), yielding an average of 22°C (72°F). July also tends to be wetter, with 71 mm (2.8 in) of precipitation over 8 days compared to September's 51 mm (2.0 in) over 9 days. Additionally, humidity levels are slightly higher in July at 63%, compared to September's 60%. For more details on July's weather, you can visit Izmit weather in July.
In September, the weather marks a noticeable shift from August, with cooler minimum temperatures dropping to 7°C (44°F) compared to August's 14°C (57°F). While both months share similar maximum temperatures peaking at 36°C (97°F in September, 96°F in August), the average temperature in September is slightly lower at 20°C (68°F) than August's 23°C (73°F). Precipitation also increases in September, with 51 mm (2.0 in) over 9 days, compared to August's 29 mm (1.2 in) over just 5 days. Humidity remains fairly comparable, slightly higher in September at 60% versus 55% in August, contributing to a more noticeably varied weather pattern. For a detailed look at August weather specifics, you can visit Izmit weather in August.
September generally offers warmer temperatures compared to October, with a minimum of 7°C (44°F) and an average of 20°C (68°F), peaking at 36°C (97°F). In contrast, October sees a drop in temperatures, starting from a minimum of 3°C (38°F) and averaging 15°C (59°F), with a maximum of 33°C (92°F). Additionally, October experiences more precipitation, with 79 mm (3.1 in) over 11 days, compared to September's 51 mm (2.0 in) spread across 9 days, resulting in higher humidity levels in October at 73% versus 60% in September. If you’d like more details about October weather, you can check Izmit weather in October.
In September, the weather typically features a comfortable average temperature of 20°C (68°F), with daytime highs reaching up to 36°C (97°F). The month experiences relatively low humidity at 60% and a modest amount of precipitation totaling 51 mm (2.0 in) over about 9 days. In contrast, November brings a significant drop in temperatures, with average conditions hovering around 11°C (51°F) and maximums peaking at 25°C (78°F). This month is characterized by higher humidity at 82% and increased rainfall, totaling 66 mm (2.6 in) across approximately 10 days. For more detailed weather insights, check Izmit weather in November.
In September, the weather is typically warmer, with average temperatures around 20°C (68°F) and peaks reaching as high as 36°C (97°F). Humidity levels hover around 60%, and the month receives a moderate amount of precipitation, totaling 51 mm (2.0 in) over about 9 days. In contrast, December brings a significant drop in temperatures, with averages falling to around 7°C (45°F) and maximums reaching only 19°C (67°F). This month is much wetter as well, with 131 mm (5.2 in) of rain spread across 16 days, coupled with higher humidity at 85%. For more details on what to expect, check Izmit weather in December.
As September unfolds in Izmit, the weather offers a pleasant transition from the intense heat of summer to more moderate temperatures. With maximums reaching 36°C and an average around 20°C, this month provides a delightful mix of warm days and cooler nights. Although September experiences about 51 mm of rainfall spread across 9 days, the humidity remains comfortable at 60%. This combination of warm temperatures and occasional rain sets September apart from the drier and hotter months preceding it, making it a great time for outdoor activities. To explore more about the weather patterns in this beautiful city, check out Izmit Climate.