Last updated: August 21, 2025
September in Poros, Greece offers a delightful blend of warm temperatures and mild weather. With maximum highs reaching 32°C (91°F) and an average of 25°C (77°F), visitors can enjoy plenty of sunshine and outdoor activities. The nights cool down to a pleasant 18°C (65°F), making evening strolls by the waterfront particularly enjoyable. Although the month sees some precipitation, totaling 30 mm (1.2 in) over just 2 days, the generally 65% humidity ensures a comfortable atmosphere. Whether you're exploring the island's rich history or lounging on its picturesque beaches, September provides an ideal setting for a memorable getaway.
As summer transitions to autumn in Poros, Greece, September offers a delightful climate that perfectly balances warmth and mildness. With average temperatures around 25°C (77°F), visitors can enjoy pleasant days without the sweltering heat of August. The minimum temperatures rise to 18°C (65°F), creating ideal conditions for outdoor activities and exploration, while the maximum can still hit a comfortable 32°C (91°F). This month serves as a beautiful bridge between the scorching summer and the cooler fall, making it one of the most attractive times to experience the island's stunning landscapes and cultural offerings. Whether lounging on the beach or hiking the scenic trails, September's climate invites relaxation and adventure alike.
In September, Poros, Greece, experiences a notable shift in precipitation patterns as the summer heat gradually gives way to the cooler autumn climate. With a total rainfall of 30 mm (1.2 in) over just 2 days, the month marks a significant increase from the drier summer months of July and August, which recorded minimal rain at 5 mm and 6 mm respectively. This uptick serves as a precursor to the wetter months ahead, seamlessly transitioning into the wetter October and November, which collectively see an increase in both precipitation levels and rainy days. As the landscape transforms, this moderate rainfall in September not only replenishes the environment but also signals a change in the rhythm of both nature and daily life on the island.
As September unfolds in Poros, Greece, the air begins to shift, welcoming a modest humidity level of 65%. This marks a subtle increase from the summer's low of 63% in August, indicating a transition away from the dry heat of summer. Throughout the year, humidity levels in Poros tend to fluctuate, beginning at a peak of 76% in January and tapering down to their lowest point in July and August. As autumn approaches, the humidity gradually rises again, hinting at the cooler, more refreshing months ahead. This trend not only enhances the island's natural beauty but also offers a comfortable atmosphere for visitors as the weather evolves.
As summer transitions into autumn, the September UV Index in Poros, Greece, stands at a notable 8, which falls into the very high exposure category. While it's a slight decrease from the peak summer months, it still signals the need for caution, as the recommended burn time remains a brisk 15 minutes. This trend reflects a gradual decline in UV intensity, following a sweltering peak of 10 from June through August. Travelers and beachgoers should remain vigilant, as even in September, the sun can be quite intense. For more detailed information, visit Poros UV Index.
UV Risk Categories
In September, the sun continues to grace Poros, Greece, with 346 hours of brilliant daylight, making it a delightful time to visit. The summer months reach their peak in July with 422 hours, but as August wanes, the sunlight gently recedes. Despite this, September maintains a warm glow, providing visitors with ample opportunities to soak in the scenic beauty before the autumn transition, which brings a decrease to 318 hours in October. The gradual decline in daylight hours from the vibrant summer months to the softer tones of fall showcases the enchanting shift of seasons, inviting travelers to relish the lingering warmth of summer while preparing for the cozy charm of autumn.
As September rolls into Poros, Greece, the likelihood of enjoying sunny weather remains relatively high, with a whopping 80% chance of sunshine. This beautiful island transitions from the peak summer months, where July and August boast almost guaranteed sunshine at 96% and 97% respectively. Although September sees a slight dip in sunshine compared to the summer, it's still significantly sunnier than the earlier months of the year, such as January (50%) and April (57%). This trend highlights a consistent pattern of increased sunlight as summer progresses, making September a delightful time to soak in the warm Mediterranean rays before the cooler autumn months take over.
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 and autumn approaches, September in Poros, Greece greets visitors with a gentle breeze, averaging 4.0 m/s (9 mph). This slight uptick in wind speed from August's 3.4 m/s marks a transition where the warm, sun-soaked days begin to cool. Following a gradual decline from the spring's higher winds, September offers a delightful blend of mild temperatures and refreshing gusts, creating an inviting atmosphere for outdoor activities. As the months progress towards winter, the winds pick up again, indicating a shift in the seasonal landscape, yet September remains a sweet spot, perfectly balancing summer's warmth with hints of autumn's cool embrace.
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.
In September, the weather is warm and inviting, with temperatures ranging from a comfortable 18°C (65°F) at night to a warm 32°C (91°F) during the day, and an average of 25°C (77°F). The month sees relatively low precipitation, with only 30 mm (1.2 in) falling over just 2 days, creating a pleasant atmosphere with a humidity level of 65%.
In contrast, January experiences much cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 20°C (69°F), leading to a chilly average of 12°C (53°F). This month is wetter, with 52 mm (2.0 in) of rain spread across about 7 days, contributing to a higher humidity level of 76%. For a detailed look at January weather, explore Poros weather in January.
September and February present quite contrasting weather patterns. In September, temperatures range from a mild 18°C (65°F) at night to a warm 32°C (91°F) during the day, with an average temperature of 25°C (77°F). Precipitation is relatively low, totaling 30 mm (1.2 in) over just 2 days, and humidity levels hover around 65%. In contrast, February experiences cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 18°C (65°F), averaging 13°C (55°F). The month is wetter, receiving 46 mm (1.8 in) of rain over 7 days, and humidity is slightly higher at 75%. For more detailed insights on February weather, check out Poros weather in February.
In September, the weather tends to be warm and pleasant, with average temperatures around 25°C (77°F) and maximums reaching up to 32°C (91°F). Humidity is relatively moderate at 65%, and there’s a minimal amount of precipitation, with only about 30 mm (1.2 in) falling over just two days. In contrast, March experiences much cooler temperatures, averaging 13°C (56°F) and peaking at 20°C (68°F). The lower minimum temperature of 4°C (40°F) reflects the transitional nature of spring. Although March has slightly more precipitation at 33 mm (1.3 in) over four days, the humidity is higher at 74%, contributing to a distinctly different feel compared to the warmth of September. For more details on March weather, you can visit Poros weather in March.
In comparing the weather of September and April, we see a significant contrast in temperatures and humidity levels. September boasts a warm climate with minimum temperatures around 18°C (65°F) and average highs reaching up to 32°C (91°F), while April experiences cooler conditions with minimums of 9°C (49°F) and maximums of only 24°C (75°F). The humidity is also notably higher in April at 75%, compared to September's 65%. Additionally, while both months receive similar amounts of rainfall, September has fewer rainy days—just 2 compared to April's 4. For those looking for more details on April weather in the area, you can check out Poros weather in April.
In comparing the weather between September and May, September tends to be warmer, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 32°C (91°F), while May features cooler temperatures, with a minimum of 14°C (57°F) and a maximum of 27°C (81°F). September is also relatively dry, receiving about 30 mm (1.2 in) of precipitation over just 2 days, compared to May's lighter rainfall of 11 mm (0.5 in) over the same number of days. However, May experiences higher humidity at 77%, compared to September's 65%, creating a more humid atmosphere during the early summer month. For more detailed weather insights for May, you can check Poros weather in May.
In September, the weather features a warm average temperature of 25°C (77°F) with daily highs reaching up to 32°C (91°F), similar to June's peak temperature. However, September sees a slightly higher average temperature compared to June, which has an average of 24°C (75°F). While both months experience two days of rainfall, September has more precipitation overall at 30 mm (1.2 in), in contrast to June's 12 mm (0.5 in). Additionally, humidity levels are a bit lower in September at 65%, compared to June's 71%, making September feel marginally more comfortable. For a closer look at June's weather specifics, check out Poros weather in June.
In comparing the weather between September and July, we see notable differences in temperature and humidity. September offers a more moderate range with minimum temperatures around 18°C (65°F) and a pleasant average of 25°C (77°F), while reaching a maximum of 32°C (91°F). In contrast, July tends to be hotter, with a minimum of 22°C (71°F), an average of 27°C (81°F), and highs peaking at 34°C (94°F). Although humidity remains relatively similar, July is slightly higher at 68%, compared to September's 65%. Additionally, September experiences more precipitation at 30 mm (1.2 in) over 2 days, compared to July's minimal 5 mm (0.2 in) on just one day. For more details on July weather in Poros, you can visit Poros weather in July.
In comparing the weather between August and September, it's clear that August typically experiences warmer temperatures, with an average of 28°C (82°F) compared to September's 25°C (77°F). August also sees higher maximum temperatures, reaching up to 34°C (93°F), while September peaks at 32°C (91°F). Precipitation is notably lower in August, with only 6 mm (0.2 in) falling over the entire month, contrasting with September's 30 mm (1.2 in) over two days, and the humidity levels remain fairly similar at 63% in August and 65% in September. For more detailed information on August weather, you can visit Poros weather in August.
In September, the weather typically remains warmer, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 32°C (91°F). The month experiences relatively low precipitation, totaling 30 mm (1.2 in) over just 2 days, and a humidity level of 65%. In contrast, October brings cooler temperatures, with averages between 15°C (60°F) and 28°C (83°F). This month sees slightly higher precipitation, amounting to 28 mm (1.1 in) over 4 days, along with increased humidity at 72%. For more details on October weather, you can visit Poros weather in October.
In September, the weather is typically warm and pleasant, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 32°C (91°F). The month sees relatively low precipitation, with only about 30 mm (1.2 in) over just 2 days and a humidity level of 65%.
In contrast, November brings cooler temperatures, with a minimum of 11°C (53°F) and a maximum of 24°C (75°F), averaging 18°C (64°F). The rainfall increases significantly to about 47 mm (1.9 in) over 7 days, and humidity rises to 75%. This shift marks a transition to more autumn-like conditions. For more detailed information, you can check Poros weather in November.
In September, Poros enjoys warm and pleasant weather, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 32°C (91°F). The month experiences only about 30 mm (1.2 in) of precipitation spread over just two days, making it a relatively dry and humid month with a humidity level of 65%. In contrast, December brings a significant drop in temperatures, averaging between 7°C (45°F) and 20°C (69°F). This winter month sees a notable increase in rainfall, totaling 60 mm (2.4 in) over nine days, and the humidity rises to 76%, resulting in a much cooler and wetter atmosphere. For more details on December weather specifically, visit Poros weather in December.
As summer gives way to autumn, September in Poros offers a delightful mix of warm temperatures and gentle breezes, making it a transitional month that stands apart from the sweltering summer peak. With an average temperature hovering around a comfortable 25°C, visitors can enjoy pleasant days that are less humid than the height of summer. Rainfall is minimal, with only a couple of rainy days throughout the month, resulting in clear skies perfect for outdoor activities. The pleasant weather, characterized by less oppressive heat and moderate humidity, provides an ideal backdrop for exploring the island's stunning landscapes. For more detailed insights into how Poros compares throughout the year, visit Poros Climate.