Last updated: August 21, 2025
In Chalki, Greece, September unveils a delightful climate perfect for travel and exploration. With maximum temperatures reaching up to 28°C (83°F) and an average of 25°C (77°F), days are comfortably warm and inviting. The evenings bring a pleasant coolness as temperatures dip to a minimum of 21°C (70°F). Remarkably, the month boasts minimal precipitation, with only 1 mm (0.0 in) recorded over 0 days, allowing for uninterrupted outdoor activities. Combined with a humidity level of 70%, September in Chalki offers a perfect blend of warmth and comfort, making it an ideal time to bask in the beauty of this charming island.
In September, Chalki, Greece, basks in the warmth of late summer, with temperatures showcasing a delightful transition towards autumn. The average temperature hovers around 25°C (77°F), offering the perfect atmosphere for exploring the island's stunning landscapes. Mornings start with a comfortable minimum of 21°C (70°F), while the days peak at a pleasant 28°C (83°F), making it an ideal time for both beach lovers and outdoor enthusiasts. As the month progresses, evenings begin to cool just slightly, hinting at the approaching autumn, but the lingering warmth of summer remains a captivating allure for visitors seeking a less crowded escape.
In September, Chalki, Greece, experiences a striking drop in precipitation, with only 1 mm of rainfall noted throughout the month, indicating a significant shift towards drier conditions after the summer. This minimal rainfall is reflective of a broader trend observed from July through August, where no precipitation was recorded, creating a stark contrast to the wetter months that precede and follow. Interestingly, while autumn begins its slow approach, the dry spell continues with 0 precipitation days in September, setting the stage for a transition as October brings 25 mm of rain over 4 days. This pattern highlights Chalki’s significant seasonal variation, where the arid summer yields to more balanced weather as the year progresses.
September in Chalki, Greece, arrives with a moderate humidity level of 70%, marking a subtle transition from the drier summer months. As the heat of August fades, which boasts the year's lowest humidity at 66%, September brings a slight rise, yet it still remains lower than the peak summer levels. This month typically serves as a refreshing prelude to the wetter fall season, with humidity gradually ascending towards October's 76%. Throughout the year, Chalki’s humidity fluctuates, peaking in late spring at 81% in May, while maintaining a generally consistent range, averaging around 76%-77% during the cooler months. The shift in September highlights the unique balance of Chalki's climatic patterns, blending warmth with refreshing breezes as summer gracefully cedes to autumn.
As summer transitions into fall, September in Chalki, Greece maintains a very high UV Index of 9, requiring vigilant sun protection with a burn time of just 15 minutes. This trend reflects a sustained intensity in sun exposure, characteristic of the preceding months. Although it's a slight decrease from the extreme levels seen in June, the UV radiation remains significant, echoing the high values of April and May. As visitors enjoy the lingering warmth, it's crucial to stay aware of the sun’s strength—especially since the UV Index will dip to a more moderate level in October. For more detailed insights, check the full report on the Chalki UV Index.
UV Risk Categories
As summer gracefully transitions to autumn, September in Chalki, Greece continues to bask in 349 hours of sunshine, making it one of the brightest months of the year. Following the peak sunshine of 422 hours in July, there's a gentle decline, but the warmth remains inviting. The sun-drenched days of August, with 396 hours of sunlight, seamlessly lead into September, where daylight still lingers deliciously before the cooler months set in. This trend of abundant sunshine hints at a vibrant season where the island's natural beauty is illuminated, offering visitors a splendid opportunity to explore its picturesque landscapes and embrace the lingering warmth of summer's touch.
In Chalki, Greece, September continues the trend of breathtakingly sunny days, boasting a remarkable 98% chance of sunshine. As summer winds down, the likelihood of clear skies remains incredibly high, following the astonishing levels reached in July and August, both of which enjoy nearly perfect weather with chances of sun at 98% and 99%, respectively. This makes September an ideal time for those looking to bask in warm sunlight before the cooler autumn breezes set in. While the chance of sunny weather dips slightly in October, it still holds a commendable 79%, ensuring that the transition from summer to fall continues to offer plenty of opportunities for outdoor enjoyment in this beautiful Greek destination.
As summer transitions to autumn, September in Chalki, Greece sees a delightful balance of daylight, with approximately 12 hours illuminating the days. While this marks a slight decrease from the 14 hours experienced in the peak summer months of June through August, it still reflects a generous amount of sunshine for outdoor activities and exploration. The gradual decline in daylight as the year progresses showcases nature's rhythm; after September, the hours continue to shorten, with October nudging down to 11 hours. This ebb and flow of light not only highlights the changing seasons but also sets the perfect backdrop for enjoying the stunning landscapes of Chalki, where the charm of early autumn can be fully appreciated.
As September unfolds in Chalki, Greece, the average wind speed reaches a refreshing 7.8 m/s (18 mph), a slight increase from the previous month, echoing the gentle breezes of late summer. This month’s winds symbolize the transition from the warmer summer months into the cooler autumn, revealing a pattern in which the wind tends to soften in May, briefly picking up again in the late summer before gracefully tapering off into the quieter months of fall. Despite its variations, September's winds remain invigorating, making it an ideal time for sailing enthusiasts and those seeking the thrill of outdoor activities amidst the stunning Grecian scenery.
Weather in Chalki varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Chalki, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit stark contrasts in weather conditions. In September, temperatures are warm, with a minimum of 21°C (70°F) and an average of 25°C (77°F), making it a pleasant time for outdoor activities. The month is notably dry, with virtually no precipitation recorded, and humidity levels around 70%. In contrast, January experiences significantly cooler weather, with temperatures dipping to a minimum of 5°C (41°F) and averaging 14°C (57°F). This month sees considerable rainfall, totaling 120 mm (4.7 in) spread over 13 days, and humidity levels rise to 77%. For more details on winter conditions, check out Chalki weather in January.
September and February present contrasting weather patterns. In September, temperatures are warm, with a minimum of 21°C (70°F) and averaging around 25°C (77°F), perfect for outdoor activities. The month is typically dry, with no recorded precipitation and a humidity level of 70%. In stark contrast, February sees much cooler temperatures, dropping to a minimum of 6°C (43°F) and averaging 15°C (58°F). This month also experiences significant rainfall, with an average of 67 mm (2.6 in) spread over eight days, and a slightly higher humidity of 76%. For more details, you can check Chalki weather in February.
September typically boasts warmer temperatures, ranging from a minimum of 21°C (70°F) to a maximum of 28°C (83°F), with an average of 25°C (77°F). In contrast, March experiences cooler weather, with temperatures fluctuating between 7°C (44°F) and 18°C (65°F), averaging around 15°C (59°F). While September is characterized by dry conditions, with negligible precipitation and 0 rainy days, March sees a notable increase in rainfall, totaling 63 mm (2.5 in) over approximately 6 rainy days. Humidity is slightly lower in September at 70%, compared to March's 77%. For more detailed information on the weather in March, check out Chalki weather in March.
September weather tends to be warmer and drier compared to April. With average temperatures ranging from a mild 21°C (70°F) to a high of 28°C (83°F), September boasts a pleasant climate with very little precipitation—only 1 mm and no rainy days. In contrast, April experiences cooler temperatures, averaging between 11°C (52°F) and 22°C (72°F), along with more humidity at 77% and approximately 21 mm of rainfall over three days. For a closer look at April conditions, you can check out Chalki weather in April.
In comparing the weather between September and May, September typically boasts warmer temperatures, with a minimum of 21°C (70°F) and an average reaching 25°C (77°F), compared to May's cooler range, which starts at a minimum of 16°C (61°F) and averages around 20°C (68°F). Precipitation also varies, with September experiencing virtually no rain, while May sees about 5 mm (0.2 in) of precipitation over one day. Additionally, humidity levels are slightly higher in May at 81%, compared to September's 70%. For more details about weather conditions in May, you can check Chalki weather in May.
In comparing the weather of September and June, September tends to be slightly warmer overall, with an average temperature of 25°C (77°F) compared to June's 23°C (73°F). Both months experience a similar maximum temperature of 28°C (82°F), but September enjoys a higher minimum temperature of 21°C (70°F) versus June's 17°C (62°F). Precipitation is minimal in both months, with September recording only 1 mm (0.0 in) and June at 3 mm (0.1 in); however, both months have zero days of rain. Additionally, June has a bit higher humidity at 77% compared to September's 70%. For more detailed information, you can check Chalki weather in June.
In comparing the weather of September and July, we can see some similarities and a few differences. Both months feature an average temperature of 25°C (77°F), but July tends to be slightly warmer overall, with maximum temperatures reaching 30°C (86°F) compared to September's peak of 28°C (83°F). Humidity levels are fairly consistent, hovering around 70% in September and 71% in July. Interestingly, while both months record no precipitation, July remains completely dry, and September also experiences no rain, making it a great time for outdoor activities. For a closer look at July weather specifics, check out Chalki weather in July.
In comparing the weather of September to August, September tends to be slightly cooler, with average temperatures ranging from a minimum of 21°C (70°F) to a maximum of 28°C (83°F), while August experiences warmer conditions, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (88°F). Both months see minimal precipitation, with September recording just 1 mm over zero days, similar to August, which also has zero precipitation. Humidity levels are slightly higher in September at 70%, compared to 66% in August. For more detailed weather insights, you can check Chalki weather in August.
In September, the weather tends to be warmer with average temperatures around 25°C (77°F) and maximum highs reaching 28°C (83°F). This month enjoys dry conditions, recording no rainfall and relatively high humidity at 70%. In contrast, October sees a noticeable drop in temperatures, with averages around 22°C (72°F) and maximums of 26°C (79°F). Additionally, October brings increased rainfall, totaling 25 mm (1.0 in) over four days, and humidity rises slightly to 76%. For more details on what to expect, you can check Chalki weather in October.
September offers warm and pleasant weather, with average temperatures ranging from a minimum of 21°C (70°F) to a maximum of 28°C (83°F), and virtually no precipitation, making it an ideal month for outdoor activities. In contrast, November sees a significant drop in temperatures, with an average minimum of 13°C (56°F) and a maximum of 24°C (75°F). This month is also much wetter, receiving about 68 mm (2.7 in) of rainfall over approximately six days, accompanied by a slight increase in humidity to 77%. For a detailed look at what to expect, check out Chalki weather in November.
In September, the weather is warm and inviting, with average temperatures reaching around 25°C (77°F) and minimal precipitation, making it an ideal month for outdoor activities. The humidity sits at a comfortable 70%, contributing to pleasant conditions. In contrast, December brings a significant drop in temperatures, averaging 16°C (61°F) with a cooler minimum of 10°C (50°F). This month also experiences much higher rainfall, totaling 135 mm (5.3 in) over 15 days, resulting in a more humid environment at 78%. For a detailed look at the December climate, you can refer to Chalki weather in December.
As September unfolds in Chalki, it brings a pleasant transition from the sweltering summer months to milder conditions. With comfortable temperatures averaging around 25°C (77°F), this month stands out for its low precipitation, ensuring that visitors can enjoy the stunning landscapes and outdoor activities without the worry of rain. Additionally, the humidity levels hover at a manageable 70%, creating an inviting atmosphere for those eager to explore. Unlike the peak heat of July and August, September offers a more temperate experience, making it an ideal time for travelers seeking a blend of warmth and comfort. For more insights on Chalki's seasonal patterns, explore our detailed guide on Chalki Climate.