Last updated: August 21, 2025
September in Ermoupolis, Greece offers a delightful Mediterranean climate, with maximum temperatures reaching a pleasant 27°C (81°F) and an average of 23°C (74°F). The evenings cool down to a comfortable 19°C (66°F), making it ideal for enjoying outdoor activities. This month sees minimal rainfall, with just 6 mm (0.2 in) over the course of only one day, allowing for plenty of sunny skies. Humidity levels hover around 65%, providing a refreshing coastal atmosphere that complements the stunning scenery and vibrant cultural life of this charming town.
As September settles in Errmoupolis, Greece, the temperatures begin to soften, offering a pleasant transition from summer to autumn. With minimums around 19°C (66°F) and averaging a comfortable 23°C (74°F), it represents a delightful escape from the summer heat. Daytime highs peak at 27°C (81°F), providing ample warmth for beach outings and outdoor explorations. This month showcases a gradual cool down compared to the sweltering July and August, where temperatures consistently reached 30°C (85°F). Visitors can enjoy the lingering warmth while reveling in the beautiful colors of early autumn, making September a charming time to experience the vibrant atmosphere of Ermoupolis.
September in Ermoupolis, Greece, marks a gentle transition from the dry summer months into the wetter season ahead. With only 6 mm (0.2 in) of precipitation recorded over just one day, the month continues the trend established in July and August, where rain was virtually absent. This light rainfall signals the start of a shift as the region prepares for the increase in precipitation typical of autumn, with figures rising sharply in October and November. The scant September showers are a refreshing reminder of the impending seasonal changes, setting the stage for a more dynamic weather pattern in the months to come.
In September, humidity in Ermoupolis, Greece begins to shift from the summer's drier conditions, registering at 65%. This marks a subtle increase from the 63% experienced in August, suggesting a gradual transition into the autumn months. Throughout the year, humidity levels in Ermoupolis tend to fluctuate, peaking in the winter with figures around 76% in January and December, while the summer months see more comfortable lows, dipping to 68% in July. September’s figures indicate a slight recovery as the region prepares for the wetter days of fall, highlighting the dynamic interplay of seasonal change in this beautiful coastal town.
As summer winds down in Ermoupolis, Greece, September sees the UV Index gradually tapering to 8, signaling a very high exposure category. This slight decline from the peak summer months still warrants caution, as individuals can sustain sunburn in just 15 minutes. The trend indicates a shift from intense sun exposure earlier in the season, with July and August peaking at a formidable 10. While September offers a reprieve, it's essential to remain vigilant, especially as the sun's rays continue to be potent in the early autumn. For more details on UV radiation levels and safety tips, check out Ermoupolis UV Index.
UV Risk Categories
As summer gives way to autumn, September in Ermoupolis, Greece continues to bask in warmth, boasting an impressive 350 hours of sunshine. While this marks a slight dip from the sun-soaked days of July and August, it remains one of the sunniest months of the year, underscoring a trend of abundant sunshine that characterizes the region's peak season. Following the vibrancy of May through July, when hours exceeded 400, September offers a gently transitioning climate, allowing visitors to savor milder temperatures and lingering daylight. This delightful balance makes it an ideal time for exploring the charming streets of Ermoupolis, enjoying outdoor cafés, and soaking in the stunning coastal views before the cooler months set in.
As summer transitions into fall, September in Ermoupolis boasts a remarkable 90% chance of sunny weather, making it one of the sunniest months of the year. Following the peak summer months, where July and August enjoy almost uninterrupted sunshine, September continues to relish in warm, sun-drenched days. This consistent sunshine reflects a broader trend of increasing sun exposure, with probabilities climbing from a mere 42% in January to a peak of 99% in August. As the sweltering heat of summer begins to wane, September offers the perfect blend of warmth and blue skies, ideal for those seeking to bask in the early autumn sun.
As summer transitions into autumn, September in Ermoupolis, Greece, offers a gentle shift in daylight, with residents enjoying about 12 hours of light each day. This decline from the 14 hours seen in the peak summer months reflects the gradual retreat of the sun, signaling the approach of fall. After basking in the warmth and extended evenings of July and August, September brings a soft balance, maintaining a comfortable 12 hours of daylight while preparing locals for the shorter days ahead. With the vibrant summer hues still lingering, this month serves as a picturesque bridge into autumn, inviting both residents and visitors to relish the last whispers of summer's warmth before the days shorten further.
In September, the winds in Ermoupolis, Greece begin to stir with a noticeable vigor, clocking in at an average speed of 8.6 m/s (19 mph). This marks an increase from the calmer summer months, such as June and July, which featured more subdued breezes averaging around 5.1 m/s (11 mph) and 8.3 m/s (19 mph), respectively. As autumn approaches, the winds not only pick up, but they also signal a shift in the island's atmosphere, creating a refreshing contrast to the sweltering heat of August. This rise in wind speed in September is consistent with a seasonal trend, as the averages tend to increase towards the end of summer into early fall, maintaining a dynamic and invigorating experience for both residents and visitors alike. As the year progresses into October, the winds remain fairly steady, hinting at a transition that keeps the coastal spirit alive.
Weather in Ermoupolis varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ermoupolis, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather tends to be warm and pleasant, with average temperatures hovering around 23°C (74°F) and maximums reaching up to 27°C (81°F). The month is relatively dry, experiencing only about 6 mm (0.2 in) of precipitation over just one day and maintaining a humidity level of 65%. In contrast, January offers a significant chill, with average temperatures falling to 12°C (54°F) and lows dropping as low as 2°C (37°F). This month sees much more rainfall, totaling 91 mm (3.6 in) spread across 12 days, and a higher humidity of 76%. For a detailed look at January weather in Ermoupolis, you can check Ermoupolis weather in January.
September and February present contrasting weather conditions. In September, temperatures are pleasantly warm, ranging from a minimum of 19°C (66°F) to a maximum of 27°C (81°F), with an average of 23°C (74°F). This month typically sees low precipitation, averaging only 6 mm (0.2 in) over just 1 day, and the humidity sits at a moderate 65%. In stark contrast, February experiences much cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 18°C (64°F), averaging around 13°C (56°F). Additionally, February is significantly wetter, with 42 mm (1.7 in) of precipitation spread over 8 days and higher humidity at 75%. For more details on February weather specifics, visit Ermoupolis weather in February.
When comparing the weather between September and March, the differences are quite striking. September typically enjoys warmer temperatures, with a minimum of 19°C (66°F), an average of 23°C (74°F), and a maximum of 27°C (81°F). The month is relatively dry, boasting only 6 mm (0.2 in) of precipitation over just one day, and a comfortable humidity level of 65%. In contrast, March brings cooler conditions, with temperatures dropping significantly to a minimum of 4°C (39°F), an average of 14°C (57°F), and a maximum of 17°C (63°F). This month sees increased precipitation, totaling 41 mm (1.6 in) over five days, accompanied by a higher humidity level of 74%. For more detailed information, you can check Ermoupolis weather in March.
September and April present quite distinct weather patterns. In September, temperatures are warmer, with a minimum of 19°C (66°F) and an average of 23°C (74°F), peaking at 27°C (81°F). The month experiences minimal rainfall, with only 6 mm (0.2 in) over one day, making it relatively dry with a humidity of 65%. In contrast, April is cooler, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 20°C (69°F) and an average of 15°C (60°F). The precipitation is higher in April, totaling 19 mm (0.7 in) over two days, contributing to a more humid atmosphere at 75%. For more detailed information on April weather, you can check Ermoupolis weather in April.
September generally offers warmer temperatures compared to May, with average highs reaching 27°C (81°F) compared to May's average of 24°C (75°F). While both months experience similar precipitation levels, September's weather is characterized by slightly lower humidity at 65%, compared to May's higher humidity of 77%. Nights in September tend to be milder, with minimum temperatures of 19°C (66°F) as opposed to May's cooler minimum of 14°C (58°F). For more details about the weather in May, you can check this link: Ermoupolis weather in May.
In comparing the weather of September and June, both months offer pleasant, warm temperatures, with averages being quite close: September averages around 23°C (74°F), while June has an average of 22°C (73°F). September features a slightly higher maximum temperature of 27°C (81°F) compared to June's 28°C (83°F). Both months experience minimal precipitation, with September receiving 6 mm (0.2 in) over one day and June slightly less at 5 mm (0.2 in). However, June tends to have a higher humidity level at 71%, whereas September averages at 65%. For a more detailed look at June weather, you can visit Ermoupolis weather in June.
In comparing the weather between September and July, September tends to be slightly cooler with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 27°C (81°F), while July experiences warmer weather, with temperatures starting at 22°C (71°F) and peaking at 30°C (85°F). Additionally, September sees minimal precipitation with only 6 mm (0.2 in) over just one day, contrasting sharply with the dry conditions of July, which reports no rainfall at all. Humidity levels are fairly comparable, with September at 65% and July edging up to 68%. For a more detailed look, you can refer to Ermoupolis weather in July.
In comparing the weather between August and September, we observe notable differences in both temperature and precipitation. August boasts a higher minimum temperature of 22°C (71°F) and an average of 25°C (77°F), with no recorded precipitation, making it drier than September. In contrast, September experiences slightly cooler temperatures, with a minimum of 19°C (66°F) and an average of 23°C (74°F), along with a brief period of rain totaling 6 mm over one day. Humidity levels are comparable between the two months, with September slightly higher at 65% compared to August's 63%. For detailed information about August weather, you can visit Ermoupolis weather in August.
In September, the weather is generally warmer, with an average temperature of 23°C (74°F) and a minimum of 19°C (66°F), while October sees cooler conditions, dropping to an average of 20°C (68°F) and a minimum of 14°C (58°F). Precipitation also increases in October, with 22 mm (0.9 in) over 2 days, compared to just 6 mm (0.2 in) in September. Additionally, October experiences higher humidity, rising to 72%, which adds to the overall dampness of the month. For more specific details about conditions during October, you can check Ermoupolis weather in October.
September weather is generally warmer and drier compared to November. With average temperatures around 23°C (74°F) and only about 6 mm of precipitation over one day, September enjoys a comfortable climate with moderate humidity at 65%. In contrast, November experiences a significant drop in temperatures, with averages of 17°C (63°F), and increased rainfall, totaling 44 mm across six days. The humidity rises to 75%, giving November a more damp feel. For more detailed information on November weather, you can visit Ermoupolis weather in November.
In September, the weather tends to be warm and pleasant, with average temperatures reaching around 23°C (74°F) and a maximum of 27°C (81°F). The month sees only 6 mm (0.2 in) of precipitation over just one day, providing a relatively dry atmosphere with a humidity level of 65%. In contrast, December experiences much cooler conditions, with average temperatures dropping to 14°C (58°F) and highs around 20°C (68°F). This month is significantly wetter, accumulating 87 mm (3.4 in) of rain spread over 13 days, and the humidity increases to 76%. For more detailed information, you can visit Ermoupolis weather in December.
As summer gracefully transitions to autumn, September in Ermoupolis brings a delightful balance of warmth and mildness that sets it apart from the hotter peak months. With average temperatures hovering around 23°C (74°F), it offers a comfortable climate for both exploration and relaxation. The low precipitation—only a single day of rain—ensures plenty of sunshine, while humidity remains manageable at 65%. This enchanting weather presents an ideal opportunity to soak in the beauty of the island before the cooler months arrive. For more insights into weather trends throughout the year, check out Ermoupolis Climate.