Last updated: August 21, 2025
Experience the delightful September weather in Kalymnos, Greece, where temperatures reach a maximum of 28°C (83°F) and settle around an average of 24°C (75°F). With a minimum of 19°C (66°F), the conditions are perfect for outdoor exploration and relaxation. Enjoy the sunshine with virtually no rainfall—only 4 mm (0.1 in) of precipitation recorded and 0 days of rain throughout the month. The humidity hovers at a comfortable 70%, making it an ideal time to soak up the natural beauty and vibrant culture of this stunning island.
September in Kalymnos, Greece brings a delightful transition as summer begins to wane. With minimum temperatures around 19°C (66°F) and daily averages climbing to 24°C (75°F), the island offers a warm yet comfortable atmosphere perfect for exploration. The maximum temperatures peak at a pleasant 28°C (83°F), which is ideal for sun-soaked days by the beach or venturing through the stunning landscapes. This month marks a gradual cooling trend from the sweltering heat of August, ensuring visitors can enjoy ample sunshine without the overwhelming heat, making it an optimal time for both relaxation and adventure on this vibrant island.
In September, Kalymnos experiences a strikingly low level of precipitation, recording only 4 mm (0.1 in) of rain, which mirrors the nearly rainless months of July and August. This dry spell extends into the fall, significantly diverging from the wetter climate seen in earlier months, with an average of 150 mm (5.9 in) in January. Notably, September has no recorded precipitation days, marking it as a peak for sun-soaked days and clear skies, paving the way for the gradual increase in rainfall that follows as autumn settles in and the island transitions to October, when precipitation jumps to 38 mm (1.5 in). This trend highlights the island's characteristic summer dryness, followed by a rejuvenating shift toward wetter conditions as the year progresses.
As summer wanes, September's humidity in Kalymnos sees a slight uptick to 70%, marking a subtle shift from the peak dryness of August, which recorded only 66%. This month represents a transition in the climate, where lingering warmth begins to blend with the approaching autumn. Interestingly, the humidity levels remain relatively stable throughout the year, fluctuating between 66% in the height of summer and 81% in late spring. Despite the dip experienced in July and August, September’s humidity reflects the island's characteristic embrace of moisture, offering a comfortable backdrop for autumn adventures while still preserving the sun-soaked essence of summer.
In September, Kalymnos, Greece experiences a UV Index of 8, categorized as very high, indicating that sun protection is essential during this month. As summer transitions into fall, the UV Index decreases slightly from the peak levels of 10 seen in July and August, yet the potential for skin damage remains significant, with a burn time of just 15 minutes for unprotected skin. This trend highlights the importance of maintaining sun safety practices even as temperatures begin to cool. Visitors are encouraged to stay informed about UV levels and take necessary precautions while enjoying the stunning outdoor beauty of Kalymnos. For more detailed information on sun exposure and safety, check out the Kalymnos UV Index.
UV Risk Categories
September in Kalymnos, Greece, serves as a beautiful prelude to autumn, basking in 350 hours of sunshine. This month captures the essence of lingering summer warmth as daylight hours gently decline from the peak of 425 hours in July. Following the vibrant and sun-drenched days of June and July, September offers a more subdued glow, yet still presents ample sunshine for outdoor adventures and relaxation. With the island's enchanting landscapes bathed in golden light, visitors can fully experience the transition towards a quieter, more serene atmosphere before the cooler months set in. The sun-kissed days of September perfectly reflect the island's unique charm, making it an ideal time to explore Kalymnos's stunning beauty.
As summer transitions into autumn, September in Kalymnos, Greece, continues to bask in abundant sunshine, boasting a remarkable 96% chance of sunny weather. This month stands out as a continuation of the peak sunshine seen in July and August, where nearly all days are sun-kissed. The gradual dip in sunny days begins in October, yet September's weather remains predominantly bright and inviting. With May signaling the start of the sun-soaked season at 78%, the consistent upward trend through to September highlights Kalymnos as an ideal destination for those seeking the sun's warm embrace just as summer draws to a close.
As September unfolds in Kalymnos, Greece, daylight begins to wane, marking a gentle transition from the vibrant summer months into the cozy embrace of autumn. With approximately 12 hours of daylight, the island experiences a mild reduction from the previous months, still basking in ample sunshine. This trend of gradually decreasing daylight follows the peak summer months of 14 hours in June, July, and August, reflecting a natural rhythm as the year progresses. While September's sunlight offers a pleasant balance, it also signals the start of the descent into shorter days, with October bringing even less light at 11 hours. This seasonal shift invites both locals and visitors to savor the remaining golden hours while preparing for the enchanting changes autumn brings.
As summer fades into autumn, September in Kalymnos, Greece, experiences a gentle shift in its winds, averaging 8.0 m/s (18 mph). This slight decrease from the summer months heralds a transition from the robust breezes of July and August, which often hovered around 8.4 m/s (19 mph) and 8.2 m/s (18 mph)**, respectively. The winds, while still pleasant, begin to calm, setting the stage for more tranquil days ahead. Interestingly, this month tends to be a bridge, with winds more comparable to the gentler currents of May and October, both of which feature significantly lower averages of 6.2 m/s (14 mph) and 6.4 m/s (14 mph). As the island prepares for the cooler seasons, September's winds carry with them a sense of serenity, perfect for leisurely strolls along the stunning coastline.
Weather in Kalymnos varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kalymnos, focusing on differences in temperature, rainfall, humidity, and UV levels.
September presents a warm and inviting climate, with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 28°C (83°F) and an average of 24°C (75°F). The month is characterized by low precipitation, recording just 4 mm (0.1 in) over zero rainy days and a humidity level of 70%. In contrast, January is much cooler, with temperatures that dip to a minimum of 5°C (42°F) and peak at 19°C (66°F), averaging only 13°C (56°F). This month experiences significant rainfall, totaling 150 mm (5.9 in) across 13 days, along with a slightly higher humidity of 77%. For a detailed look at the weather conditions during this winter month, visit Kalymnos weather in January.
Comparing the weather in September and February reveals striking contrasts. September boasts a warm climate with average temperatures around 24°C (75°F), peaking at 28°C (83°F), and is characterized by low precipitation, with only 4 mm (0.1 in) and no rainy days, along with a humidity level of 70%. In stark contrast, February experiences significantly cooler temperatures, averaging 14°C (57°F) and reaching a maximum of 19°C (66°F). This month is also much wetter, receiving approximately 97 mm (3.8 in) of rainfall over about 10 days, coupled with slightly higher humidity at 76%. For more detailed insights, check Kalymnos weather in February.
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 (83°F), averaging at 24°C (75°F). This month boasts very low precipitation, with only 4 mm (0.1 in) and no rainy days, while humidity remains moderate at 70%. In contrast, March experiences cooler temperatures, with lows plummeting to 5°C (41°F) and highs reaching only 18°C (65°F), averaging around 14°C (58°F). This month sees significantly more rainfall—75 mm (3.0 in)—over approximately 7 days of precipitation, coupled with a slightly higher humidity level at 77%. For more details, you can check Kalymnos weather in March.
September weather in Kalymnos is generally warm and dry, with average temperatures ranging from a pleasant 24°C (75°F) to a high of 28°C (83°F). With minimal precipitation and humidity around 70%, it offers ideal conditions for outdoor activities. In contrast, April brings more variable weather, with cooler temperatures averaging 16°C (61°F), a high of 21°C (70°F), and increased precipitation of 30 mm spread over 4 days. The humidity is slightly higher at 77%, which can make the atmosphere feel more moist. For those interested in exploring the April climate in more detail, you can check out Kalymnos weather in April.
September and May both offer mild and pleasant weather, but they have some distinct differences. In September, temperatures range from a minimum of 19°C (66°F) to a maximum of 28°C (83°F), contributing to an average of 24°C (75°F). The month experiences minimal precipitation, with no rainy days, and a relatively comfortable humidity level of 70%. In contrast, May has slightly cooler temperatures, ranging from a low of 15°C (60°F) to a high of 24°C (75°F), resulting in an average of 19°C (67°F). Like September, May also sees low precipitation levels of 4 mm (0.1 in) and no rainy days, but the humidity is a bit higher at 81%. For a more detailed look at May weather conditions, you can check out Kalymnos weather in May.
When comparing the weather in September and June, September enjoys slightly warmer temperatures, with a minimum of 19°C (66°F) and an average high of 28°C (83°F), while June has cooler temperatures, ranging from a minimum of 16°C (61°F) to a maximum of 27°C (82°F). Both months experience minimal precipitation, with September recording 0 rainfall days compared to June's 1 day of precipitation, although both months have the same total of 4 mm (0.1 in) of rainfall. However, September tends to be less humid at 70%, in contrast to June's higher humidity level of 77%, making September feel a bit more comfortable overall. For more detailed information, you can check out Kalymnos weather in June.
In comparing the weather between September and July, September tends to offer slightly cooler temperatures, with a minimum of 19°C (66°F) and an average of 24°C (75°F), while July has a higher minimum of 22°C (71°F) and an average of 25°C (77°F). Both months experience minimal rainfall, with September seeing only 4 mm (0.1 in) of precipitation across 0 days, while July boasts a completely dry record of 0 mm (0.0 in), making it an ideal time for outdoor activities. Humidity levels are quite similar, with September at 70% and July at 71%. For more detailed information on July weather, check out Kalymnos weather in July.
In comparing the weather between September and August, we see a slight decline in temperatures as September's averages range from a minimum of 19°C (66°F) to a maximum of 28°C (83°F), whereas August boasts higher temperatures with a minimum of 23°C (73°F) and a maximum of 29°C (85°F). September experiences minimal precipitation at just 4 mm (0.1 in), also with zero days of rain, while August remains completely dry. Interestingly, humidity levels are slightly higher in September at 70%, compared to August's 66%. For more details, you can check Kalymnos weather in August.
September typically boasts warmer temperatures, with a minimum of 19°C (66°F) and an average high of 28°C (83°F), making it a pleasant month with minimal precipitation at just 4 mm and no rainy days. In contrast, October brings cooler weather, with temperatures dipping to a minimum of 15°C (59°F) and an average high of 25°C (77°F). This month also sees increased precipitation, totaling 38 mm over four days, contributing to a higher humidity level of 76%. For more details on October's weather, you can visit Kalymnos weather in October.
In comparing the weather between September and November, there are notable differences in temperature and precipitation levels. September boasts a warm climate with minimum temperatures around 19°C (66°F) and average highs reaching 28°C (83°F), accompanied by very little precipitation. Contrastingly, November experiences cooler temperatures, with minimums dropping to 12°C (53°F) and average highs of 23°C (74°F). Additionally, November is considerably wetter, receiving 87 mm (3.4 in) of precipitation over 8 days, compared to the dry conditions of September. This increase in humidity from September's 70% to November's 77% also adds a different feel to the atmosphere. For more details on November weather specifics, you can visit Kalymnos 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 (83°F), accompanied by low precipitation levels of just 4 mm (0.1 in) and high humidity at 70%. In contrast, December brings a significant drop in temperatures, averaging between 9°C (48°F) and 21°C (69°F). The month experiences much higher precipitation, totaling 179 mm (7.1 in) over about 15 days, and the humidity rises slightly to 78%. For more details, you can check Kalymnos weather in December.
As summer transitions to autumn, September in Kalymnos offers a delightful escape with warm temperatures and minimal rainfall, creating the perfect backdrop for outdoor activities. The average temperature comfortably settles around 24°C (75°F), promising enjoyable days that aren't as scorching as the peak summer months. With humidity at a manageable 70% and virtually no precipitation, visitors can fully embrace the island's stunning scenery without the interruptions of rain. This idyllic weather makes September an exceptional time to explore Kalymnos's natural beauty and vibrant culture. For a detailed look at the weather patterns, check out Kalymnos Climate.