Last updated: August 21, 2025
September in Kos, Greece offers a delightful blend of warm temperatures and mild weather, making it an ideal time for outdoor adventures. With a maximum temperature reaching up to 28°C (84°F) and an average of 24°C (76°F), visitors can enjoy sunny days perfect for beach outings. The climate is complemented by a minimum temperature of 19°C (66°F) during the evenings, ensuring a pleasant atmosphere. Rain is scarce, with only 4 mm (0.2 in) of precipitation spread across just 1 day, while the humidity sits comfortably at 70%. This combination provides a picturesque setting for travelers seeking relaxation and exploration in this beautiful Greek island paradise.
As September graces Kos, Greece, the island basks in pleasantly warm temperatures, with average daily highs reaching 28°C (84°F) and lows settling at 19°C (66°F). This month marks the transition from the sizzling summer heat of August, which boasts maximums around 30°C (87°F), to a more temperate climate as autumn approaches. With average temperatures hovering at a comfortable 24°C (76°F), September offers ideal conditions for beach lovers and outdoor enthusiasts alike, perfect for enjoying the beautiful Mediterranean scenery before the cooler days of October set in. This gradual cooling trend not only makes for more enjoyable sightseeing but also invites visitors to partake in the island's rich cultural festivities under the warm, golden sun.
September in Kos, Greece, marks the tail end of the dry summer season, with a noticeable dip in precipitation. Receiving just 4 mm (0.2 in) of rain on a solitary day, the month stands in stark contrast to the heavier downpours expected in the following months. As temperatures still linger in late summer warmth, this minimal rainfall serves as a gentle reminder of the autumn transition awaiting in October, when precipitation rises significantly. The dry streak from July and August, which see no rain at all, yields to this slight drizzle, hinting at the changing seasons ahead, where October presents a more substantial 57 mm (2.2 in) of rain over four days. This pattern illustrates how Kos begins to shift from its sun-drenched days to the onset of autumn, with September feeling like a brief pause before the rain returns.
In September, humidity in Kos, Greece tends to settle at a comfortable 70%, marking a slight increase from the drier summer months of July and August, which recorded 71% and 66% respectively. As the season shifts, this modest rise indicates a transition from the peak summer heat, yet still allows for pleasantly warm days and cooler evenings. Notably, September’s humidity levels are similar to the consistent figures observed earlier in the year, such as January and March at 77%, suggesting that while the summer's oppressive heat wanes, the pleasant Mediterranean climate remains inviting for visitors.
In September, Kos, Greece, experiences a UV Index of 8, categorized as very high, indicating that sun protection is essential during this time. As summer fades, the intensity of UV radiation slightly decreases from the peak levels seen in July and August, when the index consistently hit 10. However, September retains a burn time of just 15 minutes, so visitors should remain vigilant. This month's UV exposure is still akin to that of April and May, when sun safety was critical. As you enjoy the beautiful landscapes and sunny shores of Kos, be sure to check the Kos UV Index for daily updates and protect your skin from harmful rays!
UV Risk Categories
As summer winds down, September in Kos, Greece still offers a generous 349 hours of sunshine, making it a delightful time to experience the island's vibrant charm. This month showcases a notable trend, as the sunny days begin to taper off from the peak of July's 424 hours. While the warmth lingers, you can enjoy the serene beaches before the crowds disperse, and the inviting Mediterranean climate transitions into a more temperate autumn. With sunlight gradually decreasing into October, September presents an ideal balance of warmth and outdoor activity, allowing visitors to soak up the last golden rays before the cooler months set in.
September in Kos, Greece, boasts an impressive 95% chance of sunny weather, making it one of the most delightful months to visit. Following the peak summer months of July and August, which see nearly uninterrupted sunshine at 98% and 99%, September continues this trend, ensuring that visitors can still bask in the warm Mediterranean sun. As summer gracefully transitions into autumn, travelers can enjoy pleasant temperatures and relatively low precipitation, creating the perfect backdrop for leisurely days on the beach or exploring the island's rich history. With a notable decline in chances of rain compared to the earlier months of the year, September stands out as an idyllic time to experience the beauty of Kos.
As summer transitions into autumn, September in Kos, Greece boasts a delightful 12 hours of daylight, marking a gradual decline from the sun-drenched peak of 14 hours during the height of July and August. This gradual shift signals the slow retreat of summer, offering a perfect balance for those keen to enjoy the lingering warmth while also welcoming the refreshing onset of fall. Notably, the daylight duration steadily increases from the winter months, starting at a mere 9 hours in January and rising until it peaks in the summer. As October approaches, daylight inches down again to 11 hours, reminding us of the cyclical beauty of seasonal change that characterizes this charming Mediterranean locale.
In September, the winds in Kos, Greece, begin their gentle descent with an average speed of 7.2 m/s (16 mph), making it a pleasant transition from the summer's breezy days. As the charts show, wind speeds peak in the colder months—January and December both boast an invigorating 7.9 m/s (18 mph)—while the summer months hover between 5.9 m/s (13 mph) in May and 7.6 m/s (17 mph) in August. This gradual decrease through September signals not only a shift in the season but also a return to the more serene, tranquil atmosphere that autumn brings, inviting visitors to enjoy the island's beauty without the intense summer heat. With the strong, consistent breezes of the earlier months giving way to a calmer, inviting ambiance, September offers the perfect backdrop for exploring Kos's enchanting landscapes.
Weather in Kos varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kos, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit stark differences in weather conditions. In September, temperatures are pleasantly warm, with an average of 24°C (76°F) and a maximum reaching up to 28°C (84°F). The month is relatively dry, receiving only 4 mm of precipitation over just one day and boasting a humidity level of 70%. In contrast, January is much cooler, with average temperatures plummeting to 13°C (55°F) and a maximum of 18°C (66°F). This month is significantly wetter, experiencing 193 mm of precipitation across 14 days, coupled with a higher humidity level of 77%. For more details, you can check out Kos weather in January.
In September, the weather is warm and pleasant, with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 28°C (84°F) and an average of 24°C (76°F). There is minimal precipitation, with only 4 mm (0.2 in) falling over just one day, and the humidity sits at a moderate 70%. In contrast, February is much cooler, with temperatures ranging from a chilly 4°C (40°F) to a maximum of 18°C (66°F) and an average of 14°C (57°F). This month sees significantly more rainfall, with 108 mm (4.2 in) recorded over 11 days, and the humidity rises slightly to 76%. For more detailed information on February weather, you can visit Kos weather in February.
September weather is characterized by warm temperatures, with a minimum of 19°C (66°F) and an average of 24°C (76°F), reaching a maximum of 28°C (84°F). The month sees very little rainfall, with only 4 mm (0.2 in) of precipitation on just 1 day, and a humidity level around 70%. In stark contrast, March experiences much cooler temperatures, with a minimum of 4°C (40°F) and an average of 14°C (58°F), peaking at only 18°C (65°F). Rainfall is significantly higher in March, totaling 95 mm (3.7 in) over 8 days, coupled with a slightly higher humidity of 77%. For a detailed look at the weather patterns, visit Kos weather in March.
In September, the weather is noticeably warmer, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 28°C (84°F), while April sees cooler temperatures, averaging between 9°C (49°F) and 22°C (71°F). September experiences significantly less precipitation, with only about 4 mm (0.2 in) over just one day, compared to April's 36 mm (1.4 in) of rainfall spread across five days. Additionally, humidity levels are slightly lower in September at 70%, while April tends to feel more humid at 77%. For more information on the weather patterns during April, you can visit Kos weather in April.
In September, the weather tends to be warm and pleasant, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 28°C (84°F). The month experiences low precipitation, averaging only 4 mm (0.2 in) over just one day, and the humidity sits at a comfortable 70%. Conversely, May features slightly cooler temperatures, with averages from 15°C (60°F) to 24°C (76°F) and higher precipitation levels of 7 mm (0.3 in) over two days, along with increased humidity at 81%. For more detailed information on the weather patterns in May, you can visit Kos weather in May.
In comparing the weather of September and June, we see that September tends to have slightly warmer temperatures, with an average of 24°C (76°F) compared to June's 23°C (73°F). While both months experience minimal precipitation, June has a marginally higher rainfall of 6 mm, whereas September receives just 4 mm. Humidity levels are also higher in June at 77%, compared to September's 70%. Overall, both months offer pleasant weather, making them ideal for outdoor activities. For more details, you can check Kos weather in June.
In comparing the weather patterns of September and July, September features a slightly cooler range with minimum temperatures around 19°C (66°F) and maximum temperatures reaching 28°C (84°F), whereas July sees warmer temperatures, with a minimum of 22°C (72°F) and a maximum of 30°C (86°F). While September experiences minimal precipitation of just 4 mm (0.2 in) over one day, July remains completely dry with no recorded rainfall. Humidity levels are quite comparable, with September at 70% and July slightly higher at 71%. For a detailed look at July conditions, you can check Kos weather in July.
In comparing the weather of September and August, September offers slightly cooler temperatures, with a minimum of 19°C (66°F) compared to August's more tropical minimum of 23°C (74°F). Average temperatures in September are around 24°C (76°F), while August maintains a warmer average of 26°C (79°F). Additionally, September experiences some light precipitation—4 mm (0.2 in) over one day—whereas August is completely dry with no recorded rainfall. Humidity levels are marginally higher in September at 70%, compared to 66% in August, contributing to a slightly more humid atmosphere. For more detailed information on August weather, you can check Kos weather in August.
September typically enjoys warmer temperatures, with averages around 24°C (76°F) and maximums reaching up to 28°C (84°F). It also experiences relatively low precipitation, averaging only 4 mm over a single day, alongside a humidity level of 70%. In contrast, October sees a notable drop in temperature, with averages of 21°C (71°F) and maximums of 25°C (78°F). However, it is also much wetter, receiving around 57 mm of rain over four days, and the humidity rises slightly to 76%. For more detailed information, you can check Kos weather in October.
In September, the weather is typically warm and pleasant, with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 28°C (84°F) and an average of 24°C (76°F). This month experiences low precipitation at just 4 mm (0.2 in) over 1 day, along with moderate humidity around 70%. By contrast, November brings cooler temperatures, with a minimum of 11°C (52°F) and a maximum of 23°C (74°F), averaging 19°C (66°F). This month sees a significant increase in rainfall, totaling 123 mm (4.8 in) over 9 days, alongside slightly higher humidity at 77%. For more details on November weather, you can check Kos weather in November.
September weather is typically warm and pleasant, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 28°C (84°F). The month experiences low precipitation, with only 4 mm (0.2 in) over the course of just 1 day, and humidity levels around 70%. In contrast, December brings a significant drop in temperature, averaging between 8°C (47°F) and 20°C (69°F). This month sees much higher precipitation, totaling 237 mm (9.3 in) spread across 15 days, and a slight increase in humidity to 78%. For a more detailed look at December weather, you can check out Kos weather in December.
As summer gently transitions to autumn, September in Kos brings a delightful change in weather that stands out from the hotter months. With pleasantly warm temperatures averaging around 24°C (76°F) and a comfortable minimum of 19°C (66°F), visitors can enjoy the island's beauty without the intense summer heat. The month is notably dry, boasting only one day of rain and a minimal precipitation total, making it an ideal time for outdoor activities. With humidity levels around 70%, the weather remains enjoyable for both relaxation and exploration. For more insights on what to expect throughout the year, check out Kos Climate.