Last updated: August 21, 2025
September in Kea, Greece boasts a delightful blend of warm weather and refreshing breezes. With maximum temperatures reaching up to 32°C (90°F) and an average of 24°C (76°F), the island offers the perfect climate for outdoor activities and relaxation. The minimum temperature dips to a comfortable 18°C (64°F), ensuring pleasant evenings. While rainfall is minimal at just 13 mm (0.5 in) over the course of about one day, humidity levels hover around 65%, making for a mild and enjoyable atmosphere. This month epitomizes the charm of late summer in Kea, inviting visitors to bask in its sun-soaked beauty.
In September, Kea, Greece, experiences a pleasing transition between summer's warmth and the cooler embrace of autumn. With minimum temperatures around 18°C (64°F), the island offers a still-warm environment that many travelers find inviting. The average rises to a delightful 24°C (76°F), just right for those who enjoy the lingering summer sun without the peak heat of July and August. As the month progresses, the maximum temperature, reaching up to 32°C (90°F), hints at late summer’s farewell, making it an ideal time for beach activities and outdoor adventures. This month captures the best of both worlds, balancing comfortable warmth with a hint of the refreshing autumn breeze.
In September, Kea, Greece, experiences a modest increase in precipitation, recording 13 mm (0.5 in) over just one day. This rainfall marks a transition from the arid summer months, where July and August saw virtually no rain. As September progresses, the island begins to bridge the dry season and the wetter months ahead, hinting at a rejuvenation of its lush landscapes in the coming weeks. This slight uptick in moisture serves as a gentle reminder of the seasonal shift, setting the stage for October's increased rainfall as the island welcomes autumn.
As summer wanes in Kea, Greece, September brings a subtle shift in humidity levels, averaging at 65%. This marks a gradual increase from the dry spell of August, which recorded its lowest humidity at 63%. The transition into fall is gentle, with humidity rising from the summer months but still remaining lower than the winter average, which hovers around 76%. Overall, September serves as a bridge, blending the warmth of summer with the coolness of autumn, offering a comfortable climate for both exploration and relaxation.
As September unfolds in beautiful Kea, Greece, the UV Index remains impressively high at 8, categorized as very high, with a burn time of just 15 minutes. This trend mirrors the peak summer months, where the island consistently recorded the highest UV levels at 10 from June through August. As the warmth of summer gives way to the early hints of autumn, the UV exposure slightly decreases, yet still demands caution for sun protection. It's a gentle reminder that while the days may be getting shorter, the sun's rays are still potent. For more detailed insights into the UV Index year-round, visit Kea UV Index.
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As summer fades into autumn, September on the enchanting island of Kea, Greece, still basks in warmth and light, showcasing 349 hours of sunshine. This month marks a gentle decline from the sun-kissed heights of July, which boasts the year’s peak at 425 hours, and August, which still holds onto the summer's glow with 397 hours. September's sun-drenched days are a precious transition, offering a delightful blend of late summer warmth and the crispness of early autumn. With hours of daylight gradually decreasing into October's 324 hours, it’s the last chance to savor longer, sunlit afternoons before the cooler months set in, making it an ideal time for leisurely exploration of the island's stunning landscapes.
In Kea, Greece, September offers a delightful 84% chance of sunny weather, making it one of the most favorable months for sun-seekers. Following the peak summer months of July and August, which boast staggering sun probabilities of 96% and 97% respectively, September transitions into autumn while still holding on to summer's warmth and brightness. The gradual decrease in sunlight from the blazing summer shows a shift, yet this month remains one of the sunniest, significantly outpacing the lower percentages seen in the colder months like January and November. With its inviting climate, September is an ideal time to experience the island's breathtaking scenery bathed in golden sunlight.
As summer transitions into autumn, September in Kea, Greece presents a delightful balance of daylight, offering 12 hours of natural light. This marks a gradual decline from the peak summer months, where daylight extends to 14 hours in June, July, and August. The month bridges the vibrant spirit of summer with the softer tones of fall, providing a soothing yet significant reduction in daylight. As daylight slowly diminishes, dipping to 11 hours in October and continuing a gentle descent through the year, September serves as a lovely reminder of summer's lingering warmth while hinting at the cozy evenings ahead.
As summer wanes, the September winds in Kea, Greece, pick up slightly, with an average speed of 5.6 m/s (13 mph), making it a welcoming transition into autumn. This increase in wind speed—a slight uptick from August's 4.6 m/s—indicates that the sizzle of summer is yielding to more refreshing breezes. Following a trend of gentle winds throughout late spring and early summer, September's conditions are invigorating for outdoor enthusiasts. As the year progresses, the wind speed begins to stabilize, peaking again in December at 6.4 m/s, suggesting a delightful rhythm to Kea's coastal climate where each season offers its own distinct charm.
Weather in Kea varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kea, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present striking contrasts in weather. In September, temperatures range from a mild 18°C (64°F) at night to a warm 32°C (90°F) during the day, with an average of 24°C (76°F). The month sees relatively low precipitation, with only 13 mm (0.5 in) over approximately one day, and humidity levels sit at 65%. In contrast, January is much colder, with temperatures ranging from a chilly 1°C (34°F) at night to a comfortable 20°C (69°F) in the daytime, averaging just 11°C (52°F). Rainfall increases significantly to 68 mm (2.7 in) over about eight days, and humidity rises to 76%. For a detailed look at January weather, visit Kea weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures are warm, with a minimum of 18°C (64°F) and an average of 24°C (76°F), peaking at 32°C (90°F). Precipitation is relatively low, with only about 13 mm (0.5 in) over the course of just one day, and humidity levels hover around 65%. In contrast, February experiences much cooler temperatures, ranging from a minimum of 3°C (37°F) to an average of 12°C (54°F), with a maximum of 18°C (65°F). This month is considerably wetter, featuring about 46 mm (1.8 in) of rain across seven days, while humidity rises to 75%. For a more detailed look at February weather, you can visit Kea weather in February.
When comparing the weather in September and March, there are notable differences in temperature and precipitation. September boasts much warmer temperatures, with a minimum of 18°C (64°F) and an average of 24°C (76°F), peaking at a maximum of 32°C (90°F). In contrast, March has significantly cooler temperatures, ranging from a minimum of 3°C (38°F) to an average of 13°C (56°F), with a maximum of only 20°C (69°F). Additionally, September experiences minimal precipitation at just 13 mm (0.5 in) over about 1 day, while March sees more rain, accumulating 38 mm (1.5 in) over approximately 4 days. Humidity levels are also higher in March at 74%, compared to 65% in September. For more detailed insights on the weather during this month, visit Kea weather in March.
In comparing the weather between September and April, September emerges as the warmer month, with temperatures averaging around 24°C (76°F) compared to April's cooler average of 16°C (60°F). While September boasts maximum temperatures reaching up to 32°C (90°F), April's peak temperature is a milder 23°C (75°F). Precipitation is notably lower in September, with only about 13 mm over just one day, whereas April experiences more rain, totaling 24 mm across three days. Additionally, humidity levels are slightly higher in April at 75%, compared to September's 65%. For more detailed insights on April weather, you can check out Kea weather in April.
In comparing the weather between September and May, September tends to be warmer, with average temperatures peaking at 24°C (76°F) and maximums reaching up to 32°C (90°F). In contrast, May offers a cooler climate, with average temperatures around 20°C (68°F) and maximums at 30°C (85°F). Both months experience similar levels of precipitation, with 13 mm (0.5 in) falling over one or two days; however, September typically has lower humidity at 65% compared to May’s 77%. For more details on the weather conditions during May, you can visit Kea weather in May.
In comparing the weather between September and June, both months exhibit similar average temperatures, hovering around 24°C (75°F). However, September tends to be slightly warmer, with maximum temperatures reaching 32°C (90°F) compared to June's peak of 31°C (89°F). The minimum temperatures in both months are also comparable, with September starting at 18°C (64°F) and June at 16°C (61°F). Precipitation levels are nearly the same, yet June experiences a bit more rainfall across two days, while September has only one day of rain. Additionally, humidity is higher in June at 71%, compared to September's 65%. For more details on weather specifics in June, check out Kea weather in June.
In September, temperatures show a gradual decline with a minimum of 18°C (64°F) and a maximum of 32°C (90°F), averaging at 24°C (76°F). The month experiences minimal rainfall, recording just 13 mm (0.5 in) over only one day, and maintaining a humidity level of 65%. In contrast, July is hotter, with a minimum of 21°C (71°F), an average of 27°C (80°F), and a peak temperature of 37°C (99°F). July also boasts very low precipitation at just 2 mm (0.1 in) across zero rainy days, while humidity is slightly higher at 68%. For more details about July weather, you can check Kea weather in July.
In September, the weather becomes slightly cooler compared to August, with average temperatures ranging from a minimum of 18°C (64°F) to a maximum of 32°C (90°F). August, on the other hand, boasts warmer temperatures, showing a minimum of 22°C (72°F) and peaking at 35°C (95°F). While both months experience low precipitation, September records about 13 mm (0.5 in) over one day, whereas August remains almost entirely dry with just 1 mm (0.1 in) and no rainy days at all. Humidity levels are relatively similar, hovering around 65% in September and slightly lower at 63% in August. For more details on August weather, visit Kea weather in August.
September typically offers warmer temperatures, with minimums around 18°C (64°F) and maximums peaking at 32°C (90°F), while October sees a notable drop, with averages ranging from 13°C (56°F) to 27°C (82°F). Although September enjoys less precipitation, averaging only 13 mm (0.5 in) over just one day, October brings slightly more rain at 22 mm (0.9 in) across three days. Additionally, October's humidity increases to 72%, compared to September's 65%, contributing to a different feel in the air. For a more detailed overview of what to expect in October, you can check out Kea weather in October.
September and November display quite a contrast in weather patterns. In September, temperatures are warm, with a minimum of 18°C (64°F) and an average of 24°C (76°F), peaking at a maximum of 32°C (90°F). The month experiences relatively low precipitation, with only 13 mm (0.5 in) over just one day, and humidity sits at 65%.
In contrast, November brings cooler temperatures, featuring a minimum of 10°C (51°F), an average of 17°C (63°F), and a maximum of 23°C (74°F). This month sees a significant increase in rainfall, totaling 45 mm (1.8 in) across seven days, and humidity rises slightly to 75%. For more insights on November weather, you can check Kea weather in November.
In September, the weather is warm and pleasant, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 32°C (90°F) and an average of 24°C (76°F). The month typically experiences low precipitation, with only about 13 mm (0.5 in) over just one day, creating a relatively dry atmosphere with humidity around 65%.
In contrast, December brings a significant drop in temperatures, with a minimum of 6°C (43°F) and a maximum of 20°C (67°F), averaging just 14°C (57°F). This month sees a much higher precipitation level, totaling 80 mm (3.2 in) over approximately 10 days, and increased humidity at 76%. The shift from September to December highlights a transition from warm summer days to cooler, wetter winter weather. For more details about the weather during this time, you can check Kea weather in December.
September in Kea ushers in a delightful transition as summer's heat begins to wane. With milder temperatures averaging around 24°C (76°F), it offers a refreshing respite compared to the scorching highs of July and August. The minimal rainfall, limited to just one day, ensures that the island remains pleasantly dry, ideal for outdoor adventures and beach lounging. Moreover, the humidity is comfortably balanced at 65%, allowing for enjoyable days without the sweltering stickiness often felt in peak summer months. This harmonious blend of warmth and dryness makes September a wonderful time to experience the beauty of Kea. For a deeper insight into seasonal changes, be sure to check out Kea Climate.