Last updated: August 21, 2025
September in Poros, Greece, offers a delightful blend of warm sunshine and gentle breezes, making it a perfect time to explore the island. With maximum temperatures reaching up to 28°C (82°F) and an average of 24°C (76°F), visitors can enjoy comfortably warm days ideal for outdoor activities. Nights cool down to a pleasant 18°C (64°F), providing a refreshing respite. While the month experiences about 49 mm (1.9 in) of rainfall spread over 4 days, the humidity remains moderate at 56%, ensuring the atmosphere is lively yet enjoyable. This transition period heralds the tail end of summer, inviting both relaxation and adventure against the backdrop of Poros’ stunning natural beauty.
In September, Poros, Greece, enjoys a delightful transition as summer gradually gives way to autumn. With temperatures ranging from a minimum of 18°C (64°F) to a comfortable maximum of 28°C (82°F), this month showcases pleasant warmth along with lower humidity, making it an ideal time for outdoor exploration. The average temperature settles at a cozy 24°C (76°F), creating perfect conditions for swimming, immersing in local culture, or simply relaxing by the waterfront. As the days shorten and evenings cool down slightly, September offers a beautiful blend of summer's lingering sunshine and autumn's refreshing charm, enticing visitors to savor the island's natural beauty.
In September, Poros, Greece begins to transition from the summer's arid conditions, receiving an average precipitation of 49 mm (1.9 in) over four days. This uptick marks a noticeable shift from the exceptionally dry months of July and August, where rainfall was scarce, totaling just 5 mm and 2 mm, respectively. As the month progresses, the combination of warm temperatures and increased humidity often leads to occasional showers, setting the stage for the wetter months ahead. October follows with a significant rise in precipitation to 121 mm (4.8 in), indicating a clear trend towards the autumn rains, which further intensify through to November and December. This gradual increase not only revitalizes the landscape but also prepares the region for the cooler, wetter winter months, illustrating how September serves as a bridge between the dry summer and the lush autumn.
As summer transitions to autumn in Poros, Greece, September experiences a moderate humidity level of 56%, reflecting a trend of increasing comfort as the intense heat of the summer months begins to wane. This decrease from the sweltering 47% in August signals the gradual shift toward wetter conditions, with humidity rising again in October to 70%. Interestingly, September maintains a relative balance, neither too dry nor overly humid, making it an ideal time for outdoor activities against the backdrop of the breathtaking island scenery. This period serves as a bridge, connecting the dry, sunny days of summer with the more humid months that follow, particularly as the island prepares for the lushness of autumn and winter.
As summer transitions to fall, September in Poros, Greece presents a UV Index of 8, signifying a very high risk of harm from unprotected sun exposure. This month, the burn time stands at just 15 minutes, similar to the peak summer months of June, July, and August, which also recorded a UV Index of 10. While there’s a slight dip from the sweltering summer, the intense late-season sun still demands caution. It's crucial to adopt protective measures like sunscreen and hats when venturing outdoors. As the weather starts to cool, October will see the UV Index drop to 6, shifting into a high exposure category, offering a bit of relief for those looking to enjoy the beautiful autumn days. For more insights on UV levels throughout the year, visit Poros UV Index.
UV Risk Categories
As summer gracefully transitions into autumn, September in Poros, Greece retains a remarkable charm with 347 hours of sunshine. This month captures the essence of late summer, showcasing a delightful balance of warmth and clarity. While the days may shorten compared to the sun-drenched peak of July, which boasts an impressive 422 hours, September still offers a generously bright atmosphere that beckons visitors and locals alike. The gradual dip in sunshine hours from August's 395 hours signals the onset of fall, yet the weather remains inviting, perfect for lounging on sun-kissed beaches or exploring the island's breathtaking landscapes. With October following closely at 314 hours, it's clear that Poros continues to bask in the golden glow of the sun, making it an ideal time to enjoy the lingering warmth of summer.
In September, visitors to Poros, Greece can still revel in a generous 74% chance of sunny weather, making it a delightful time to explore this beautiful island. As the summer months wane, the likelihood of sunshine remains notably high, though it does dip slightly from the peak of July's 97%. This gradual decrease highlights a trend where late summer retains a warm and inviting atmosphere, perfect for beach days and outdoor adventures. Following September, the chance of sunny weather declines further into autumn, emphasizing September as a sweet spot for sunshine-seekers before the cooler months set in. With pleasant temperatures and a beautiful landscape, it's an ideal month for visitors to soak up the last rays of summer.
In September, Poros, Greece experiences a gentle transition from the long summer days of July and August, where daylight stretches to 14 hours, to the shorter afternoons of fall. With approximately 12 hours of daylight, September's sunshine still feels generous, allowing plenty of time for outdoor activities and exploration. As the month progresses, the days gradually shorten, a reflection of the shifting seasons. This trend continues into October and November, where daylight dips further, casting a warm, golden light over the island and inviting visitors to relish the last whispers of summer before autumn sets in.
As summer fades, September in Poros, Greece transitions to a gentle breeze, with average wind speeds of 4.4 m/s (10 mph)—a continuation of the calm winds felt in August. This serene atmosphere marks a shift from the higher gusts of earlier months, with wind speeds gradually rising to 6.3 m/s (14 mph) in October, signaling the onset of autumn. The mild September winds invite relaxation and leisurely strolls along the waterfront, capturing the essence of the island’s laid-back charm. As the months progress, the winds will gradually intensify, suggesting that while summer’s whispers linger, the dynamic energy of autumn is just around the corner.
Weather in Poros varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Poros, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures are pleasantly warm, with minimums around 18°C (64°F), average highs of 24°C (76°F), and peaks reaching up to 28°C (82°F). The month sees relatively low precipitation of 49 mm (1.9 in) over just 4 days, combined with a moderate humidity level of 56%. In contrast, January brings much cooler weather, with minimum temperatures dropping to 3°C (38°F) and an average of 12°C (54°F), while highs only reach 19°C (66°F). Additionally, January is significantly wetter, experiencing 179 mm (7.1 in) of rain over 14 days, alongside a higher humidity of 84%. For a more detailed overview of the weather during this winter month, visit Poros weather in January.
September and February present strikingly different weather conditions. In September, temperatures are milder, with a minimum of 18°C (64°F) and an average of 24°C (76°F), peaking at 28°C (82°F). The month sees relatively low precipitation, totaling 49 mm (1.9 in) over about 4 days, along with moderate humidity levels at 56%. In contrast, February experiences much cooler weather, with temperatures ranging from a minimum of 4°C (40°F) to an average of 13°C (55°F), and a maximum of 17°C (63°F). This month is characterized by higher rainfall, accumulating 96 mm (3.8 in) across approximately 10 days, and increased humidity at 78%. For more detailed weather information, you can check Poros weather in February.
September and March present distinctly different weather conditions. September enjoys warmer temperatures, with averages around 24°C (76°F), peaking at 28°C (82°F), while March sees much cooler averages of 13°C (56°F), with a maximum of only 17°C (63°F). The humidity levels in March are higher at 75%, compared to September's more comfortable 56%. Additionally, March experiences more precipitation, with 63 mm (2.5 in) over about 10 days, compared to September's 49 mm (1.9 in) over just 4 days. For a detailed look at March weather, check out Poros weather in March.
When comparing the weather in September and April, there are notable differences in temperature and humidity. September enjoys warmer temperatures, with averages around 24°C (76°F) and maximums reaching up to 28°C (82°F), while April is cooler, averaging only 15°C (60°F) and peaking at 23°C (74°F). Additionally, September experiences moderate humidity at 56%, whereas April has higher humidity levels at 70%, contributing to a distinctly fresher feel. In terms of precipitation, September receives about 49 mm (1.9 in) over approximately four days, compared to April's 31 mm (1.2 in) spread across five days, making it a slightly wetter month overall. For a detailed look at April's weather conditions, please visit Poros weather in April.
September tends to be warmer than May, with average temperatures reaching 24°C (76°F) compared to May's 18°C (65°F). Additionally, September's maximum temperature can soar up to 28°C (82°F), while May's highest usually peaks at 24°C (75°F). When it comes to precipitation, September experiences more rain at 49 mm (1.9 in) over four days, whereas May is relatively drier with just 16 mm (0.6 in) over three days. However, May has higher humidity levels at 72% compared to September's 56%. For a more detailed look, you can visit Poros weather in May.
In comparing the weather of September and June, September tends to be slightly warmer, with average temperatures around 24°C (76°F), compared to June's average of 22°C (71°F). While both months experience similar maximum temperatures of around 27-28°C (82°F), September has a higher minimum temperature of 18°C (64°F) versus June's 16°C (62°F). Precipitation levels are also more pronounced in September, with 49 mm falling over four days, in contrast to June's lighter 23 mm over just two days. Humidity is relatively comparable, with September at 56% and June slightly higher at 60%. For more detailed insights specifically about June weather, check out Poros weather in June.
In comparing the weather of September and July, both months display average temperatures hovering around 24°C (76°F), with July exhibiting slightly warmer minimum temperatures at 20°C (68°F) compared to September's 18°C (64°F). However, September experiences more substantial precipitation, totaling 49 mm (1.9 in) over four days, while July remains relatively dry, receiving only 13 mm (0.5 in) in a single day. Humidity levels remain consistent at 56% for both months, making them similarly comfortable. For more specific insights about July weather, you can visit Poros weather in July.
In comparing the weather of September and August, September shows a slight decrease in average temperatures, with a minimum of 18°C (64°F) and a maximum of 28°C (82°F) compared to August's warmer range of 23°C (73°F) to 30°C (85°F). Additionally, September experiences more precipitation, totaling 49 mm (1.9 in) over four days, while August remains quite dry, only seeing 5 mm (0.2 in) in just one day. Humidity levels are also higher in September at 56%, compared to 47% in August, indicating a shift towards more summer-like conditions as fall approaches. For a detailed look at the weather specifics in August, you can visit Poros weather in August.
In September, the weather is generally warmer, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 28°C (82°F) and an average of 24°C (76°F). This month experiences relatively low precipitation of 49 mm (1.9 in) over about 4 days, coupled with a humidity level of 56%. In contrast, October brings cooler temperatures, with a minimum of 15°C (59°F), an average of 21°C (70°F), and a maximum of 26°C (79°F). However, it is also significantly wetter, with precipitation reaching 121 mm (4.8 in) over 8 days and increased humidity at 70%. For more detailed weather insights, check Poros weather in October.
September brings warmer temperatures, with minimums around 18°C (64°F) and averages peaking at 24°C (76°F), while November ushers in cooler weather as temperatures drop to a minimum of 12°C (53°F) and an average of 18°C (64°F). Additionally, September experiences relatively low precipitation of 49 mm (1.9 in) over just 4 days, whereas November sees a significant increase, with a total of 225 mm (8.8 in) spread across 14 days, leading to higher humidity levels of 80%. For more details on November's weather, check out Poros weather in November.
September weather is generally warm and pleasant, with average temperatures ranging from a minimum of 18°C (64°F) to a maximum of 28°C (82°F). It experiences relatively low precipitation, totaling 49 mm (1.9 in) over just four days, and moderate humidity at 56%. In contrast, December brings a significant drop in temperatures, with averages between 8°C (46°F) and 19°C (67°F). This month is considerably wetter, receiving about 204 mm (8.0 in) of rain over 16 days, coupled with higher humidity levels at 83%. For more details, check out Poros weather in December.
As summer fades, September in Poros offers a delightful transition into autumn, featuring pleasant temperatures that strike a balance between warmth and comfort. With an average warmth around 24°C (76°F), days are still sunny and inviting, yet the heat is less intense than the peak summer months. While you may encounter a few rainy days, the overall precipitation remains low, resulting in a refreshing atmosphere with humidity around 56%. This month is ideal for enjoying outdoor activities without the summer crowds, making it a hidden gem for travelers. For more detailed insights on what to expect throughout the year, check out Poros Climate.