Last updated: August 21, 2025
Experience the enchanting weather of Ermioni, Greece, in September, where the perfect blend of sun and sea awaits. With maximum temperatures reaching a warm 34°C (93°F) and a comfortable average of 25°C (77°F), the days invite you to bask in the warmth. Evenings cool down to a delightful 17°C (63°F), ensuring a pleasant escape. While September may bring 3 days of rain, totaling 36 mm (1.4 in) of precipitation, the humidity remains at a moderate 65%, preserving the refreshing coastal atmosphere. Whether exploring the charming streets or relaxing by the water, Ermioni's September weather creates an ideal backdrop for your Mediterranean getaway.
As September arrives in Ermioni, Greece, the summer's lingering warmth begins to showcase a delightful transitional phase. With minimum temperatures averaging around 17°C (63°F) and reaching a comfortable 34°C (93°F) at their peak, this month strikes a balance between the sweltering highs of July and August and the cooler autumn days that follow. The average temperature settles at a pleasant 25°C (77°F), inviting visitors to bask in the sun while enjoying the fading summer vibes. As daylight hours gradually shorten, the evenings become refreshingly mild, making this an ideal time for outdoor activities or leisurely strolls along the waterfront. The shift in temperature is a reminder of the seasonal change, yet the warmth of early fall still embraces all who visit.
In September, Ermioni experiences a noticeable uptick in precipitation, with 36 mm (1.4 in) of rain over about 3 days. This marks a transition from the arid summer months of July and August, which see minimal rainfall of just 8 mm and 9 mm respectively. As the dry spell ends, the slightly increased precipitation sets the stage for the autumn season, hinting at the coming months of more consistent rain. Despite September's increase, it remains drier than the winter months of January, November, and December, which often see over 45 mm of rain. This gradual shift in weather patterns underscores Ermioni's distinct climate rhythms, combining warm late summer days with the early whispers of fall.
As summer transitions into fall, September humidity in Ermioni, Greece exhibits a modest rise to 65%, marking a shift from the arid conditions typically experienced in the peak summer months of July and August, where humidity levels dipped to 68% and 63%, respectively. This slight increase in moisture signals a hint of the approaching autumn, as humidity levels begin to stabilize, paralleling the rise seen in October at 72%. Overall, September’s humidity sets the stage for a refreshing change, contrasting with the drier summer climate while still remaining lower than the winter months, which hover around 76%. This trend hints at a comfortable, inviting atmosphere perfect for enjoying Ermioni's picturesque landscapes before the cooler months arrive.
As summer transitions to autumn in Ermioni, Greece, the UV Index begins to decline from its peak levels. In September, the UV Index sits at 8, categorized as very high, indicating that sun exposure can still lead to skin damage in just 15 minutes. This month marks a shift from the relentless tenacity of the summer sun, which consistently registered an index of 10, where precautions were essential for enjoying the outdoors. As the cooler months approach, the UV Index gradually lowers, with October seeing a slight dip to 7, reflecting a more moderate sun intensity. For those planning outdoor activities, staying informed about the changing UV Index is key to enjoying the sunshine safely. For more details, check out the Ermioni UV Index.
UV Risk Categories
In September, Ermioni basks in a warm embrace of 345 hours of sunshine, marking a delightful transition from the peak summer days. This month maintains a bright glow reminiscent of August's vibrant 394 hours, while naturally ebbing as the days begin to shorten with the approach of autumn. The sunshine hours in September are notably higher than earlier months, such as January, with its mere 210 hours, or even the switch to spring when March offers only 329 hours. This gradual descent from summer's brilliance showcases the charm of early autumn in Greece, inviting visitors to enjoy cooler temperatures and the lingering warmth of the sun.
In September, Ermioni, Greece, enjoys a remarkable 77% chance of sunny weather, making it one of the most delightful months for sun-seekers. This statistic reflects a gradual decrease in sunshine from the summer peak, with July and August boasting impressive probabilities of 94% and 96%, respectively. As the summer heat wanes, September remains a prime time to bask in pleasant weather, contrasting with the more variable conditions that follow in October and November. Thus, travelers can still relish the warmth of early autumn, making it an ideal month for outdoor activities and leisurely strolls along the sun-kissed shores.
As summer gently gives way to autumn in Ermioni, Greece, September marks a transition in daylight hours, offering approximately 12 hours of sunlight each day. This slight decrease from the 14 hours experienced in the peak summer months reflects a gradual shift in the season, where the warm days linger but start to shorten. With daylight steadily diminishing from May's vibrant 14 hours, visitors can enjoy the still-sunny afternoons while embracing the beauty of the changing leaves. The trend emphasizes a comforting blend of warmth and early twilight, making September a delightful month for exploration and relaxation in this picturesque coastal town.
As summer wanes into autumn, September in Ermioni, Greece, greets visitors with a refreshing shift in wind patterns. With an average wind speed of 3.0 m/s (7 mph), September marks a subtle increase from the calmer summer months, bringing a gentle breeze that enhances the idyllic coastal ambiance. This uptick in wind speed, along with October's slight rise to 3.3 m/s (7 mph), hints at the approaching seasonal transition. As the days grow shorter, these invigorating winds create perfect conditions for outdoor activities, inviting both locals and travelers to bask in the beauty of this charming Greek enclave.
Weather in Ermioni varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ermioni, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly contrasting weather patterns. In September, temperatures are warm, with averages around 25°C (77°F) and highs reaching up to 34°C (93°F), accompanied by moderate humidity at 65%. Precipitation is relatively low, totaling 36 mm (1.4 in) over just 3 days. In contrast, January experiences much cooler conditions, with an average temperature of 11°C (52°F) and maximums of only 21°C (70°F). The month is wetter, with 46 mm (1.8 in) of rain spread over 8 days, and humidity rises to 76%. For those interested in detailed insights about the winter weather, check out Ermioni weather in January.
September and February present contrasting weather patterns. In September, the temperatures range from a mild 17°C (63°F) to a warm maximum of 34°C (93°F), with an average of 25°C (77°F). The month experiences relatively low precipitation, with only 36 mm (1.4 in) over about three days, and humidity sits at around 65%. In stark contrast, February is considerably cooler, with temperatures spanning from a minimum of 3°C (38°F) to a maximum of 19°C (66°F), averaging just 12°C (54°F). The month is slightly wetter, with 45 mm (1.8 in) of rain falling over six days, and humidity levels rise to 75%. For more detailed information, check Ermioni weather in February.
In September, the weather is characterized by warmer temperatures, with a minimum of 17°C (63°F) and an average reaching 25°C (77°F), peaking at a maximum of 34°C (93°F). The month sees a total precipitation of 36 mm (1.4 in) over about 3 days, accompanied by a humidity level of 65%. In contrast, March experiences much cooler conditions, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 22°C (72°F), resulting in an average of 13°C (55°F). Although March has slightly less precipitation at 33 mm (1.3 in), it occurs over 4 days and features a higher humidity of 74%. For detailed information on March weather in Ermioni, you can visit Ermioni weather in March.
When comparing the weather in September and April, significant differences emerge. September boasts warmer temperatures with a minimum of 17°C (63°F), averaging 25°C (77°F), and peaking at 34°C (93°F) under a generally sunny sky. In contrast, April experiences cooler weather, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 25°C (77°F) and an average of just 15°C (60°F). While September receives slightly more precipitation over fewer days (36 mm over 3 days), April encounters a bit less rain (30 mm), but it lasts a bit longer with precipitation occurring on 5 days. Additionally, April's higher humidity at 75% contrasts with September's lower level of 65%. For a closer look at what to expect in April, visit Ermioni weather in April.
In comparing September and May weather, September experiences warmer temperatures with a minimum of 17°C (63°F) and an average of 25°C (77°F), peaking at a maximum of 34°C (93°F). This month sees about 36 mm (1.4 in) of precipitation over three days and carries a humidity level of 65%. By contrast, May is cooler with a lower minimum temperature of 12°C (54°F) and an average of 20°C (68°F), reaching up to 31°C (87°F). Precipitation in May is less, totaling 16 mm (0.6 in) over the same three days, but it has a higher humidity at 77%. For a detailed look at May's weather in the region, check out Ermioni weather in May.
When comparing the weather in September to that of June, we notice some interesting contrasts. September features a warmer average temperature of 25°C (77°F), with highs reaching up to 34°C (93°F), while June has a slightly lower average of 24°C (76°F) but can peak at an even higher 36°C (96°F). Precipitation is also more abundant in September, with 36 mm (1.4 in) over three days compared to June's 21 mm (0.8 in) over four days. Additionally, September's humidity is lower at 65%, making it feel slightly more comfortable than June's 71%. For more specific details, you can check out Ermioni weather in June.
In September, the weather in Ermioni offers slightly cooler temperatures compared to July, with a minimum of 17°C (63°F) and an average of 25°C (77°F), peaking at a comfortable 34°C (93°F). In contrast, July experiences higher temperatures, starting at a minimum of 21°C (70°F) and reaching an average of 28°C (82°F), with maximums climbing to a scorching 39°C (103°F). Additionally, September sees more precipitation, totaling 36 mm (1.4 in) over three days, while July is relatively dry with only 8 mm (0.3 in) across two days of rain. The humidity levels are also similar, with September at 65% and July slightly higher at 68%. For more details on July weather, visit Ermioni weather in July.
In comparing the weather of September to August, we see a noticeable shift in temperatures and precipitation. September experiences a lower minimum temperature of 17°C (63°F) compared to August's 22°C (72°F), while the average September temperature is 25°C (77°F), down from August's 28°C (83°F). The maximum temperature also decreases in September, reaching 34°C (93°F) versus August's peak of 38°C (101°F). Additionally, September has slightly more precipitation, totaling 36 mm (1.4 in) over 3 days, in contrast to August, which only sees 9 mm (0.3 in) on just 1 day. Humidity levels remain relatively stable, with September at 65% and August at 63%. For a more detailed look at August weather, check out Ermioni weather in August.
September typically features warmer temperatures with a minimum of 17°C (63°F) and an average of 25°C (77°F), peaking at a maximum of 34°C (93°F). The month experiences some rainfall, totaling 36 mm (1.4 in) over about 3 days, with humidity levels around 65%. In contrast, October brings cooler weather, with temperatures dropping to a minimum of 13°C (56°F), an average of 21°C (69°F), and a maximum of 30°C (86°F). Precipitation slightly decreases to 30 mm (1.2 in) but occurs over 4 days, while humidity increases to 72%. For more detailed information on October weather, you can visit Ermioni weather in October.
In September, temperatures remain warm with a minimum of 17°C (63°F) and an average of 25°C (77°F), peaking at a hot 34°C (93°F). The month sees limited rainfall, with only 36 mm (1.4 in) falling on about 3 days, and humidity levels averaging around 65%. In contrast, November experiences a notable drop in temperatures, with a minimum of 10°C (51°F) and an average of 17°C (63°F), reaching a maximum of 24°C (76°F). This month also witnesses more frequent rain, accumulating 45 mm (1.8 in) over 7 days, and higher humidity, averaging 75%. For a detailed look at the weather specifics, check Ermioni weather in November.
In September, the weather is notably warmer, with temperatures ranging from a minimum of 17°C (63°F) to a blistering maximum of 34°C (93°F), and an average of 25°C (77°F). The month sees relatively low precipitation of 36 mm (1.4 in) across just three days, coupled with a humidity level of 65%. In contrast, December brings a significant drop in temperatures, with a minimum of 6°C (43°F), an average of 13°C (56°F), and a maximum of 20°C (69°F). The precipitation increases to 49 mm (1.9 in) over eight days, and humidity rises to 76%. For a closer look at December weather specifics, you can visit Ermioni weather in December.
As September unfolds in Ermioni, the summer heat begins to wane, making way for a more comfortable climate. With daily highs reaching about 34°C (93°F) and an average temperature settling around 25°C (77°F), this month balances warmth with a refreshing transition towards autumn. Unlike the sweltering peak of summer, September showcases a more moderate climate with relatively low rainfall, averaging only 36 mm over a mere 3 days. This reduction in precipitation and a pleasant humidity level of 65% create an inviting atmosphere, perfect for soaking up the last rays of summer. For a closer look at how September compares to other months, explore more at Ermioni Climate.