Last updated: August 21, 2025
Experience the enchanting weather of Ios, Greece in September, where average temperatures hover around 23°C (74°F), peaking at a delightful 27°C (81°F) during the day. With a comfortable minimum of 19°C (67°F) at night, it invites you to relish the evenings. This month boasts an almost rain-free climate, recording a mere 3 mm (0.1 in) of precipitation, making it ideal for outdoor adventures and beach relaxation. Humidity levels sit at a pleasant 70%, enhancing the overall charm of this stunning island destination. Come and soak up the sun in a paradise where the weather is as warm as the hospitality!
In September, Ios, Greece, enjoys a delightful transition as summer winds down, offering comfortable temperatures that invite both relaxation and exploration. The minimum temperature hovers at a pleasant 19°C (67°F), while the average climbs to a cozy 23°C (74°F), peaking with a maximum of 27°C (81°F). This month sees a slight dip from the sweltering highs of August, yet still provides plenty of warmth for sun-kissed days on the beach. As the island gradually shifts towards autumn, visitors can relish the lingering sun while experiencing a tranquil atmosphere, making September an ideal time to savor the beauty of Ios without the midsummer crowds.
In September, Ios, Greece, experiences a notable transition towards autumn, marked by a sharp decline in precipitation. With only 3 mm (0.1 in) of rain recorded, it's evident that summer's dry spell continues well into the month, resulting in no recorded precipitation days. This trend of minimal rainfall follows a summer characterized by negligible moisture, as both July and August witness virtually no rain at all. As temperatures cool and the island prepares for the wetter months ahead, September offers a brief respite from the rain, allowing visitors to enjoy the stunning landscapes and vibrant local culture under mostly clear skies.
As summer winds down in Ios, Greece, September embraces a pleasant transition with humidity levels averaging 70%. This marks a continuation of a gradual decline from the peak of August, where humidity dipped to 66%. Interestingly, the latter part of the year, from October onwards, sees a rise back to the mid-70s, suggesting a return to more humid conditions as autumn approaches. Overall, September offers a comfortable balance, reflecting a trend of fluctuating humidity that characterizes the island's maritime climate, making it an enticing destination for travelers looking to enjoy mild temperatures and fresh breezes.
As summer transitions to autumn in Ios, Greece, September brings a UV Index of 8, categorizing it as very high. During this month, sun seekers should be mindful of their exposure, with a burn time of just 15 minutes under the midday sun. While the UV Index begins to taper off from the peak summer months of July and August, which both share a maximum of 10, September still commands significant caution. This trend of high UV levels persists into early fall, making it essential for visitors to protect their skin and eyes. For more detailed information on sun safety in Ios, check the Ios UV Index.
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In September, Ios, Greece, enjoys a delightful blend of warm weather and abundant sunshine, boasting approximately 350 hours of radiant daylight. As summer transitions to autumn, this month reflects a gentle decline from July's peak of 425 hours, yet remains significantly sunnier compared to the milder winter months that follow. The bright days of September are a gift for travelers, offering perfect opportunities to explore the island’s stunning beaches and vibrant nightlife. This gradual decrease in sunlight is part of a broader trend, where sunshine hours taper off from the summer peak in August, revealing a charming calm before the cooler months of October and November arrive.
As summer transitions to autumn, September in Ios, Greece, still holds onto the warmth and sunshine with a remarkable 94% chance of sunny weather. This month nearly rivals the peak summer days of August, which boasts a perfect 100% sunshine guarantee. The likelihood of clear skies remains high, despite descending from the heights of July and August. Comparing September to the beginning of the year, it reveals a consistent trend of increasing sunny days, peaking in the summer months. Thus, visitors can expect beautiful sunny days perfect for exploring the island's stunning beaches and picturesque landscapes, making September an ideal time to relish the lingering summer ambiance.
As summer winds down, September in Ios, Greece sees a delightful 12 hours of daylight, marking a gentle transition from the longer days of summer. The daylight duration gradually decreases from an exuberant 14 hours in June, July, and August to a softer glow as the equinox approaches. This shift not only highlights the end of the sun-kissed beach season but also invites visitors to relish the milder temperatures and vibrant sunsets. With each passing week, the island begins to embrace the tranquil charm of autumn, making September a perfect time for explorations and leisurely strolls amidst its stunning landscapes. As daylight dwindles, the essence of Ios transforms, offering a unique blend of warmth and serenity.
As September arrives in Ios, Greece, the breeze begins to pick up, with an average wind speed of 8.1 m/s (18 mph), marking a slight increase from the summer months. This gentle yet invigorating wind is a refreshing change after the slower, warmer days of June and July, where speeds hovered around 5.1 m/s to 8.0 m/s. Transitioning into autumn, the wind remains consistently robust, reflecting September's vibrant energy while hinting at the upcoming seasonal shifts. Interestingly, the months of October and November see a slight decrease in speed, aligning with the typical pattern of wind dynamics on the island. Overall, September serves as a perfect blend of warm summer vibes and the crispness of fall, making it a delightful time for visitors seeking both adventure and relaxation on the stunning shores of Ios.
Weather in Ios varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ios, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is quite warm with average temperatures around 23°C (74°F), reaching a maximum of 27°C (81°F) and very little precipitation, just 3 mm (0.1 in), making it a dry month. The humidity is relatively moderate at 70%, allowing for comfortable outdoor activities. In contrast, January experiences much cooler temperatures, with an average of 13°C (56°F) and a maximum of 20°C (68°F), while the minimum drops to 4°C (39°F). This month sees significantly more rainfall, totaling 88 mm (3.5 in) over 12 days, and a higher humidity level of 77%. For more details on the weather specifics, you can check out Ios weather in January.
September weather in Ios is characterized by warm and pleasant temperatures, with a minimum of 19°C (67°F), an average of 23°C (74°F), and a maximum of 27°C (81°F). The month enjoys very low precipitation, with only 3 mm (0.1 in) recorded over no rainy days, resulting in a relatively dry atmosphere and comfortable humidity at 70%. In contrast, February brings a significant drop in temperatures, with minimums dipping to 7°C (44°F), an average of 14°C (57°F), and a maximum of 18°C (65°F). This month experiences much higher precipitation, totaling 57 mm (2.3 in) over 8 days, along with a slight increase in humidity to 76%. For more detailed information on the climate in February, visit Ios weather in February.
September and March present contrasting weather characteristics in many aspects. In September, the temperatures are significantly warmer, with averages around 23°C (74°F), peaking at 27°C (81°F), while March sees much cooler temperatures, averaging only 14°C (58°F) and reaching a maximum of 18°C (65°F). Additionally, September enjoys a dry climate, with no recorded precipitation, and a humidity level of 70%. In contrast, March experiences considerably more rainfall, with 42 mm (1.7 in) across seven days, coupled with a slightly higher humidity at 77%. For a more detailed look at weather conditions in March, you can check this link: Ios weather in March.
In comparing the weather between September and April, September boasts warmer temperatures, with averages around 23°C (74°F) and a maximum of 27°C (81°F), compared to April's cooler averages of 16°C (61°F) and a maximum of 20°C (69°F). Additionally, September typically experiences little to no precipitation, with just 3 mm recorded and no rainy days, while April sees a moderate amount of rain at 15 mm over two days. Humidity levels are slightly lower in September at 70%, compared to April’s 77%, contributing to a more comfortable feel during the warmer days. For more detailed information about April weather, you can visit Ios weather in April.
In September, the weather tends to be warmer than in May, with average temperatures reaching 23°C (74°F) and maximums hitting 27°C (81°F). In contrast, May's temperatures are slightly cooler, with an average of 19°C (66°F) and a max of 23°C (74°F). Both months experience minimal precipitation, with September receiving only 3 mm (0.1 in) and May slightly more at 4 mm (0.1 in), although neither month sees rain on any days. Additionally, humidity levels are slightly higher in May at 81% compared to 70% in September. For more information about the weather in May, check out Ios weather in May.
In comparing the weather of September and June, both months display similar maximum temperatures, reaching up to 27°C (81°F). September offers slightly warmer average temperatures with a minimum of 19°C (67°F) compared to June's 18°C (64°F). Both months experience low precipitation, with September having no rainy days, while June sees precipitation on just one day. However, June is generally more humid at 77% compared to September's 70%. For more detailed insights about June's weather in Ios, you can check Ios weather in June.
In comparing the weather between September and July, we can see some notable differences. September experiences slightly cooler temperatures with a minimum of 19°C (67°F) and an average of 23°C (74°F), while July maintains warmer conditions with a minimum of 22°C (72°F) and an average of 25°C (77°F). Both months are relatively dry, but September receives minimal precipitation of just 3 mm (0.1 in) across zero days, similar to July, which has no recorded precipitation at all. Additionally, humidity levels are fairly comparable, standing at 70% in September and 71% in July. For more detailed insights on July weather, visit Ios weather in July.
In September, the weather is slightly cooler than in August, with minimum temperatures of 19°C (67°F) compared to August's 22°C (72°F). The average temperature drops to 23°C (74°F) in September, while August boasts a warmer average of 25°C (77°F). Both months experience minimal precipitation, with September receiving only 3 mm (0.1 in) and August just 1 mm (0.0 in), both having no rainy days. Additionally, September has a higher humidity level at 70%, compared to August’s 66%, making it feel slightly more humid. For more details on August weather, visit Ios weather in August.
In September, the weather is noticeably warmer with an average temperature of 23°C (74°F) and maximums reaching up to 27°C (81°F). This month enjoys dry conditions, with no recorded precipitation, making it ideal for outdoor activities. However, humidity is relatively high at 70%. Conversely, October brings cooler temperatures, with an average of 21°C (69°F) and maximums of 26°C (79°F). This month also sees an increase in precipitation, totaling 18 mm (0.7 in) across three days, and the humidity rises slightly to 76%. For more details on October weather conditions, you can visit Ios weather in October.
In September, the weather is warm with temperatures ranging from a mild 19°C (67°F) at night to a comfortable average of 23°C (74°F) during the day, peaking at 27°C (81°F). The month is relatively dry, with only 3 mm (0.1 in) of precipitation and no rainy days, while humidity sits at around 70%. In contrast, November brings cooler temperatures, with nighttime lows dropping to 12°C (55°F) and daytime averages around 18°C (65°F), reaching a maximum of 22°C (73°F). This month sees significantly more rainfall, accumulating 48 mm (1.9 in) over 6 days, and humidity increases to 77%. For more details, check out Ios weather in November.
September weather is typically warm and pleasant, with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 27°C (81°F). During this month, there is minimal rainfall, averaging just 3 mm, and humidity levels are around 70%. In contrast, December brings cooler temperatures, with an average ranging from a minimum of 9°C (49°F) to a maximum of 20°C (68°F). This month is significantly wetter, experiencing about 82 mm of precipitation over 13 days, and the humidity rises to 78%. For a more detailed look at December weather, check out Ios weather in December.
As summer gracefully transitions into autumn, September brings a delightful change to Ios' weather. With warm temperatures averaging around 23°C (74°F), the island offers a comfortable climate perfect for exploration. Unlike the peak summer months that can be sweltering, September sees a refreshing dip in humidity levels to around 70% alongside a striking lack of rainfall—only 3 mm recorded across the entire month. This results in clear skies and pleasant evenings, making it an ideal time for outdoor activities and enjoying the stunning landscapes without the summer crowds. For a deeper dive into weather patterns throughout the year, visit Ios Climate.