Last updated: August 21, 2025
In September, Ilulissat, Greenland experiences a transition as summer gives way to autumn, with daily temperatures ranging from a maximum of 12°C (54°F) to a minimum of -13°C (10°F), culminating in an average of 1°C (35°F). This chilly weather is accompanied by high humidity levels at 87%, creating a brisk atmosphere ideal for those seeking a true Arctic experience. Precipitation is also prevalent, totaling 40 mm (1.6 in) over approximately 9 days, often manifesting as light rain or early snowfall. For adventurous travelers, September offers a unique glimpse into the stunning landscapes of Greenland under the crisp autumn sky.
As September unfolds in Ilulissat, Greenland, the transition from summer warmth to the impending chill of autumn becomes palpable. With temperatures ranging from a minimum of -13°C (10°F) to a maximum of 12°C (54°F), the average hovers around 1°C (35°F), marking a noticeable drop compared to the preceding months. This cooling trend clearly signals the shift in seasons, as the region prepares for the frigid winters ahead. Despite the retreat of summer's warmth, September still offers a unique allure, with cooler air invigorating the senses and the spectacular landscape beginning to showcase the early hues of fall.
In September, Ilulissat, Greenland, experiences a notable increase in precipitation, with 40 mm (1.6 in) of rain falling over 9 days. This reliability of rainfall marks a transition into the fall season, contrasting sharply with the relatively dry summer months of July and August, where each recorded 52 mm (2.1 in) over just 8 days. The trend suggests a shift from the summer's warmer, sunnier days to the cooler, more unpredictable weather of early autumn. As September progresses, the combination of increased precipitation and shortening daylight hours hints at the impending onset of winter, influencing both the local landscape and the rhythms of daily life in this Arctic town.
In September, Ilulissat, Greenland, experiences a humidity level of 87%, which is consistent with the patterns observed throughout the year. As the summer months transition into fall, September's humidity slightly dips from the peak of 90% in August, yet it still remains elevated compared to the drier summer months of July and June. This trend reflects a broader yearly cycle where humidity fluctuates significantly, with the winter months, particularly January and March, showcasing the highest levels at around 90%. Despite the subtle changes, September stands out as a time when cool breezes begin to weave in with lingering summer warmth, contributing to an overall fresh and crisp atmosphere.
As September rolls into Ilulissat, Greenland, the UV Index registers a moderate level of 3, indicating that while sun exposure is safe for most, some precautions are advisable. This trend marks a gentle decline from the peak summer months of June and July, where the UV Index reached a heightened 5. With the burn time settling at 30 minutes, it's clear that as autumn approaches, the need for sun protection remains, albeit with a lesser intensity than in the height of summer. This gradual shift in UV levels highlights the importance of adapting one's outdoor activities in harmony with the changing seasons. For more insights on UV exposure in this picturesque destination, visit Ilulissat UV Index.
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September in Ilulissat, Greenland, offers a stunning transition from the vibrant summer months to the cooler autumn, with 248 hours of sunshine gracing the skies. As the summer sun begins to wane, the daylight hours drop significantly from the peak of June's 426 hours. This month is characterized by a noticeable decline in sunlight compared to the 362 hours of August, yet it still provides a warm embrace before the darkness of October descends, bringing just 170 hours of daylight. As we reflect on the sun's journey through this Arctic town, September showcases a beautiful, albeit fleeting, farewell to the long summer days, offering a golden backdrop to the stunning landscapes that are uniquely Ilulissat.
In September, Ilulissat, Greenland, experiences a notable surge in sunny weather, with a 58% chance of sunshine—the highest percentage for the year. This increase marks a departure from the relatively lower chances observed during the summer months, where sunshine was more elusive. Following the cooler and cloudier months of early spring and summer, September’s sunny prospects present a delightful transition, making it an appealing time for visitors to explore the stunning landscapes without the typical overcast skies. This trend hints at the slow but significant return of brightness as fall begins, inviting both locals and tourists to enjoy the lingering warmth and scenic vistas of Greenland's breathtaking nature.
As summer transitions into autumn, September in Ilulissat, Greenland, showcases a notable shift in daylight duration. With approximately 13 hours of daylight, this month reflects a gradual decrease from the 24-hour daylight extravagance of June. Following the vibrant summer months, where May and June bask in nearly constant light, September marks a significant change as the region prepares for the longer, darker days ahead in October. The diminishing daylight hints at the approaching winter, but still offers ample opportunity to explore the stunning landscapes of Ilulissat under the softening autumn sun. This transitional period is characterized by a blend of lingering daylight and the early whispers of winter, creating a truly enchanting atmosphere.
In September, the winds in Ilulissat, Greenland, typically reach an average speed of 2.5 m/s (6 mph), a slight dip from the mid-summer months. Following a gentle breeze in August at 2.3 m/s (5 mph), the September winds signal the transition into the cooler autumn months. The average wind speed gradually increases again towards the end of the year, peaking in December at 3.6 m/s (8 mph). This overall trend reflects a dynamic climate, where the wind first calms during summer before picking up pace as winter approaches, enhancing the dramatic landscapes of this breathtaking Arctic region.
Weather in Ilulissat varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ilulissat, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is notably milder with average temperatures hovering around 1°C (35°F), while the minimum dips to -13°C (10°F) and the maximum reaches 12°C (54°F). The month sees about 40 mm (1.6 in) of precipitation spread over 9 days, accompanied by high humidity at 87%. In contrast, January experiences much harsher conditions, with average temperatures plummeting to -16°C (4°F) and minimums falling to a frigid -31°C (-24°F). Precipitation is less frequent, totaling 19 mm (0.7 in) over just 5 days, while humidity remains high at 90%. For more detailed information, you can visit Ilulissat weather in January.
September and February exhibit starkly contrasting weather conditions. In September, temperatures range from a minimum of -13°C (10°F) to a maximum of 12°C (54°F), with an average of 1°C (35°F). This month sees a total precipitation of 40 mm (1.6 in) over approximately 9 days, coupled with a relatively high humidity level of 87%. In contrast, February plunges into much colder territory, with temperatures that can drop to a minimum of -34°C (-30°F), averaging -18°C (0°F), and a maximum of just 0°C (33°F). The precipitation in February is significantly lower at 9 mm (0.4 in), occurring over only 2 days, while humidity stays nearly the same at 86%. For more specific details, you can visit Ilulissat weather in February.
In September, the weather is notably milder compared to March, with temperatures ranging from a minimum of -13°C (10°F) to a maximum of 12°C (54°F), averaging around 1°C (35°F). This month also experiences higher precipitation levels of 40 mm (1.6 in) over approximately 9 days, coupled with a humidity of 87%. In contrast, March is significantly colder, featuring temperatures plummeting to a minimum of -35°C (-30°F) and an average temperature of -15°C (5°F), while peaking at just 5°C (41°F). Precipitation decreases to 19 mm (0.7 in), spread across only 4 days, and humidity rises slightly to 91%. For more detailed information on March weather, you can visit Ilulissat weather in March.
In comparing the weather of September and April, we see notable differences in temperature and precipitation. September boasts a more moderate temperature range, with lows around -13°C (10°F), an average of 1°C (35°F), and highs reaching up to 12°C (54°F). In contrast, April experiences much colder conditions, with temperatures dipping as low as -26°C (-14°F) and an average of -6°C (21°F), though highs can still reach 11°C (52°F). Precipitation is also slightly lower in April, totaling 28 mm (1.1 in) over about 7 days compared to September's 40 mm (1.6 in) over 9 days. Both months share a consistent humidity level of 87%, which can make the cold feel even more penetrating in April. For a detailed look at April's conditions, you can visit Ilulissat weather in April.
When comparing the weather in September and May, notable differences emerge. September experiences slightly milder temperatures, with an average of 1°C (35°F), while May has minuscule extremes, seeing temperatures ranging from a low of -17°C (1°F) to a high of 19°C (66°F). In terms of precipitation, September has a higher level of rainfall at 40 mm (1.6 in) over 9 days, compared to May's modest 13 mm (0.5 in) across just 3 days. Interestingly, both months share the same humidity level of 87%, giving them a consistently damp feel. For more detailed information, check out Ilulissat weather in May.
When comparing the weather in September and June, notable differences emerge in temperature and precipitation. September typically experiences colder temperatures, with averages around 1°C (35°F) and a maximum of 12°C (54°F), while June offers a more moderate climate with an average of 8°C (46°F) and highs reaching 22°C (72°F). Additionally, September sees more rainfall, averaging 40 mm (1.6 in) over about 9 days, compared to June's 24 mm (0.9 in) of rain over just 5 days. Humidity remains high in both months, with September slightly higher at 87% compared to June's 84%. For more details on the pleasant June weather, check out Ilulissat weather in June.
In comparing the weather of September and July, notable differences emerge in temperature and humidity levels. September experiences much cooler temperatures, with a minimum of -13°C (10°F) and an average of just 1°C (35°F), contrasting sharply with July's milder conditions, where temperatures range from a minimum of 0°C (33°F) to a maximum of 23°C (73°F). Additionally, September has a higher humidity level at 87%, compared to July’s 82%, which contributes to a more raw and chilly feel. Precipitation is also slightly less frequent in July, occurring over 7 days, while September sees rain on 9 days despite a lower total precipitation of 40 mm (1.6 in) compared to July's 52 mm (2.1 in). For more details about July weather in Ilulissat, you can check this link: Ilulissat weather in July.
When comparing the weather in September and August, it is evident that September experiences much colder temperatures, with an average of just 1°C (35°F) compared to August's milder average of 8°C (47°F). The maximum temperatures also drop significantly, from 24°C (76°F) in August to only 12°C (54°F) in September. Furthermore, while both months see precipitation, September has slightly less at 40 mm (1.6 in) over 9 days, compared to 52 mm (2.1 in) over 8 days in August. Humidity levels remain relatively high in both months, with September at 87% and August at 90%. For more detailed information, you can check Ilulissat weather in August.
September and October present a noticeable shift in weather conditions. In September, temperatures range from a minimum of -13°C (10°F) to a maximum of 12°C (54°F), with an average temperature of 1°C (35°F) and about 40 mm (1.6 in) of precipitation over 9 days, while humidity sits at 87%. By contrast, October experiences colder weather, with temperatures dipping further to a minimum of -23°C (-10°F) and an average of -4°C (25°F), although the maximum remains similar at 11°C (52°F). Precipitation slightly decreases to 38 mm (1.5 in) over 7 days, accompanied by an increase in humidity to 89%. The transition from September to October marks a significant cooling trend, highlighting the approach of winter. For more detailed information, you can check Ilulissat weather in October.
September and November exhibit notably different weather patterns. In September, temperatures range from a minimum of -13°C (10°F) to a maximum of 12°C (54°F), with an average temperature of 1°C (35°F). This month sees around 40 mm (1.6 in) of precipitation over 9 days, and humidity levels are relatively high at 87%. In contrast, November brings colder temperatures, with a minimum of -27°C (-16°F), an average of -10°C (14°F), and a maximum of 9°C (48°F). Precipitation decreases to 29 mm (1.2 in) over 7 days, while humidity slightly increases to 90%. For more detailed insights into the November climate, you can check Ilulissat weather in November.
In September, the weather is noticeably milder, with average temperatures hovering around 1°C (35°F) and maximums reaching up to 12°C (54°F). The month experiences moderate precipitation, totaling 40 mm (1.6 in) over approximately 9 days, accompanied by high humidity at 87%. In contrast, December brings much colder conditions, with average temperatures dropping significantly to -11°C (12°F) and maximums not exceeding 7°C (44°F). While the overall precipitation decreases to 26 mm (1.0 in) over 7 days, the biting cold is more pronounced, maintaining the same humidity level of 87%. For more detailed information about December's weather in Ilulissat, you can check Ilulissat weather in December.
As September rolls into Ilulissat, the weather begins to shift dramatically, revealing the transitional nature of the season. With milder temperatures compared to the preceding summer months, the average cools down, while the chill of winter looms closer, bringing a range of temperatures that can dip significantly at night. While precipitation remains steady, this month typically experiences more frequent rainy days, contributing to a high humidity level that can make the air feel heavier. As you explore the stunning landscapes of Ilulissat during this time, be prepared for a blend of brisk days and the occasional shower, making it a unique period to witness the changing beauty of the Arctic. For a deeper understanding of how September fits into the yearly climate, check out Ilulissat Climate.