Last updated: August 21, 2025
September in Aarhus, Denmark offers a delightful transition from summer's warmth to autumn's crispness. The average temperature hovers around 14°C (57°F), with a pleasant maximum of 24°C (76°F) during the warmer days and a cool minimum of 3°C (38°F) at night. This month experiences approximately 69 mm (2.7 in) of rain spread across 12 days, making occasional showers a common occurrence. With humidity levels reaching 85%, the atmosphere can feel quite lush, enhancing the vibrant changing foliage and rich cultural experiences that Aarhus has to offer. Embrace this dynamic weather as the city gracefully shifts from summer vibrancy to autumn's charm.
As summer gracefully transitions to autumn in Aarhus, Denmark, September brings a delightful mix of warmth and coolness. With temperatures typically ranging from a minimum of 3°C (38°F) to a maximum of 24°C (76°F), the city enjoys a comfortable average of 14°C (57°F). This month marks a notable dip compared to the previous summer months, yet it still offers pleasant days that beckon outdoor activities. The gentle shift in temperature reflects the changing seasons, inviting residents and visitors alike to savor the vibrant autumn foliage while enjoying milder, sun-kissed days before winter settles in.
In September, Århus experiences a notable shift in weather patterns as the summer begins to fade. With an average precipitation of 69 mm (2.7 in) over 12 days, this month continues the trend of increased rainfall established in August, which recorded the highest amount of the year at 85 mm (3.3 in). This downward but still significant precipitation highlights the gradual transition toward autumn, with clouds often hanging low and a crispness filling the air. The balance of wet days, similar to those in July and August, combines with cooler temperatures to create a distinctly refreshing ambiance, inviting locals and visitors alike to embrace the beauty of the changing seasons.
In September, humidity in Aarhus, Denmark, reaches around 85%, marking a subtle uptick from the drier summer months. This increase hints at the transition to autumn, as the city experiences a gradual shift from the more comfortable 73% levels observed in July and June. As the warmth of summer fades, the humidity gradually rises again, echoing the higher levels seen in the earlier months of the year, notably 91% in February and 92% in January. This trend indicates a pattern where the late summer allows for a more humid atmosphere, setting the stage for the cooler, wetter months ahead, as October and November again climb back to the 90% range.
In September, the UV Index in Aarhus, Denmark shows a moderate level of solar intensity, registering at 5. This marks a slight decline from the high summer months of July and August, where the index peaked at 7. As the days begin to shorten and temperatures cool, exposure categories shift from high to moderate, allowing for 30 minutes of safe sun exposure before burning. This trend suggests that while the summer sun's potency wanes, it is still essential to remain mindful of UV levels as autumn approaches. For more detailed insights, visit Arhus UV Index.
UV Risk Categories
As the vibrant warmth of summer gives way to the crispness of autumn, September in Århus, Denmark offers a delightful blend of sunshine, basking in an impressive 312 hours of daylight. This month stands out in a year characterized by fluctuating light; it follows the sun-drenched days of July and August—the peak periods of sunlight, boasting 454 and 403 hours, respectively. While September marks a notable reduction in sunshine compared to the preceding summer months, it still provides more light than the winter season, with October dipping to 241 hours. This gentle transition, highlighted by the warmth of early autumn, sets the stage for the cozy months ahead, making it a perfect time for outdoor adventures amidst the golden hues of changing leaves.
As summer transitions into autumn, the likelihood of sunny weather in September in Aarhus, Denmark, stands at a moderate 28%. This figure reflects a notable decline from the sunnier months of June through August, where the chances hovered around 35% to 40%. Although September does not shine as brightly as its summer predecessors, it still offers a decent opportunity for enjoying clear skies compared to the gloomier months that lie ahead, such as October, with a slightly lower probability of sunshine at 25%. Overall, September serves as a gentle reminder of summer's waning warmth, allowing for pleasant, albeit less frequent, sunny days.
In September, Arhus, Denmark, experiences a gentle decline in daylight, offering about 12 hours of light. This month marks a transition from the long, luminous days of summer—where June and July boast up to 17 hours—to the shorter, chillier days of autumn. As the vibrant hues of summer begin to fade, daylight gradually recedes into October, which further shrinks to 10 hours. This diminishing daylight reaffirms the rhythmic change of seasons, allowing residents to savor the rich colors and crisp air of early fall while reminiscing about the sun-drenched days of previous months.
As September unfolds in Århus, Denmark, the wind takes on a gentler persona, with an average speed of 3.7 m/s (8 mph). This slight decrease continues a trend seen throughout the summer months, where the winds have been relatively mild, peaking again in October with a brisk 5.0 m/s (11 mph). Notably, September’s calm winds provide a serene backdrop as the vibrant fall colors begin to emerge, creating a picturesque setting reminiscent of late summer tranquility. As the year progresses into autumn, the winds will begin to pick up, but for now, September offers a gentle breeze, inviting leisurely strolls along the coast and a deeper appreciation for the transition of the seasons.
Weather in Arhus varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Arhus, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is significantly milder with average temperatures ranging from a minimum of 3°C (38°F) to a comfortable maximum of 24°C (76°F). This month experiences around 69 mm (2.7 in) of precipitation over approximately 12 days, accompanied by a humidity level of 85%, making it feel quite humid. Conversely, January is much colder, with average temperatures dipping to a minimum of -10°C (15°F) and peaking at only 11°C (51°F). Precipitation decreases to 45 mm (1.8 in) over about 9 days, while humidity rises to 92%, creating a brisk and chilly atmosphere. For more detailed information, you can check Arhus weather in January.
September and February present quite contrasting weather conditions. In September, temperatures typically range from a low of 3°C (38°F) to a warm high of 24°C (76°F), making it a mild month overall with an average of 14°C (57°F). The humidity is relatively high at 85%, and the month experiences about 69 mm (2.7 in) of precipitation over approximately 12 days.
In contrast, February is much colder, with temperatures dipping to a minimum of -13°C (9°F) and an average of only 2°C (37°F). The maximum temperature hovers around 14°C (57°F), similar to September, but the overall chill is more pronounced. February receives less precipitation than September, totaling 48 mm (1.9 in) over roughly 11 days, but the humidity is slightly higher at 91%. For those interested in more details on February weather, you can find additional information here: Arhus weather in February.
When comparing the weather in September and March, it’s clear that September offers milder temperatures, with averages ranging from a minimum of 3°C (38°F) to a maximum of 24°C (76°F). In contrast, March is much cooler, featuring temperatures that can drop as low as -9°C (17°F) and only reaching a maximum of 15°C (60°F). Both months experience similar levels of precipitation, with September receiving 69 mm (2.7 in) and March slightly less at 55 mm (2.2 in), although both months see around 12 days of rain. Additionally, September has a slightly lower humidity level at 85%, compared to March's higher humidity of 89%. For a more detailed look at March weather, you can visit Arhus weather in March.
September and April present distinct weather characteristics, reflecting the transition from summer to autumn and winter to spring, respectively. In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 24°C (76°F), with an average of 14°C (57°F), indicating a generally mild climate. The month receives about 69 mm (2.7 in) of precipitation over approximately 12 days, accompanied by high humidity levels of 85%. In contrast, April sees cooler temperatures, with a minimum of -4°C (25°F) and an average of 7°C (45°F), peaking at 23°C (74°F). This month experiences less precipitation, about 35 mm (1.4 in) spread over just 7 days, with a slight humidity decrease to 84%. For more detailed information about April weather patterns, you can visit Arhus weather in April.
In comparing the weather between September and May, we see a notable difference in temperatures and humidity levels. In September, the average temperature is warmer at 14°C (57°F), whereas May has an average of 11°C (53°F). Both months experience similar maximum temperatures, with September peaking at 24°C (76°F) and May reaching 25°C (78°F). Precipitation levels are also comparable, with September receiving 69 mm (2.7 in) and May slightly higher at 72 mm (2.8 in), both spread over 12 days. However, September is more humid, with humidity levels at 85% compared to May's 75%. For more detailed information about May's weather, you can visit Arhus weather in May.
In September, the weather tends to be cooler and more unpredictable compared to June. With average temperatures ranging from a chilly 3°C (38°F) at night to a mild 24°C (76°F) during the day, September experiences a greater spread in temperature compared to June, where temperatures range from 6°C (43°F) to a warm 27°C (80°F). Additionally, September sees a higher humidity level at 85% and more precipitation over 12 days, totaling 69 mm (2.7 in), while June has a comparatively lower humidity of 73% and less rainfall (62 mm or 2.4 in) spread over 10 days. For a detailed look at June's weather specifics, you can check Arhus weather in June.
When comparing the weather in September to July, notable differences can be observed in temperature and humidity. September experiences cooler temperatures, with a minimum of 3°C and an average of 14°C, compared to July's warmer minimum of 7°C and an average of 17°C. July reaches a maximum of 29°C, significantly higher than September's maximum of 24°C. Additionally, September is characterized by higher humidity levels at 85%, whereas July has a lower humidity of 73%. Both months see similar precipitation levels and the same number of rainy days; September records 69 mm of rainfall over 12 days, slightly more than July's 68 mm over the same number of days. For more detailed insights into July weather patterns, you can visit Arhus weather in July.
In comparing the weather between August and September, September generally experiences cooler temperatures, with a minimum of 3°C (38°F) and an average of 14°C (57°F), compared to August's milder minimum of 8°C (46°F) and average of 17°C (63°F). While August tends to be warmer, reaching a maximum of 29°C (85°F), September's highs peak at 24°C (76°F). Additionally, September receives slightly less precipitation at 69 mm (2.7 in) over 12 days, whereas August sees 85 mm (3.3 in) across 15 days. Humidity levels are also higher in September at 85%, compared to August's 77%. For more detailed information on August weather, you can visit Arhus weather in August.
September typically offers milder temperatures, with averages around 14°C (57°F) and maximums reaching 24°C (76°F). However, as the month transitions into October, the weather cools significantly, with average temperatures dropping to 10°C (51°F) and nighttime lows potentially dipping as low as -1°C (30°F). Both months experience substantial rainfall, but October sees a slight increase in precipitation to 73 mm (2.9 in) over more frequent rainy days, while humidity also rises to 91%. For a closer look at the specifics of October's climate, you can check Arhus weather in October.
In September, the weather features a mild average temperature of 14°C (57°F), with daytime highs reaching up to 24°C (76°F) and nighttime lows around 3°C (38°F). The month experiences relatively high humidity at 85% and sees approximately 69 mm (2.7 in) of precipitation over 12 days. In contrast, November brings a notable drop in temperature, with an average of 7°C (44°F) and maximums only reaching 16°C (61°F). Nighttime temperatures can dip down to -3°C (28°F), and while the precipitation is less, totaling 45 mm (1.8 in) over 10 days, humidity increases to 92%. For more detailed information on November weather, you can visit Arhus weather in November.
September weather tends to be milder, with temperatures ranging from a minimum of 3°C (38°F) to an average of 14°C (57°F) and a maximum reaching 24°C (76°F). The month also sees approximately 69 mm (2.7 in) of precipitation over 12 days, and humidity levels are relatively high at 85%.
In contrast, December offers a much colder climate, with temperatures dipping to a minimum of -8°C (18°F) and averaging around 4°C (39°F), while the maximum only reaches 10°C (51°F). Although December has slightly less precipitation, at 57 mm (2.2 in) over 13 days, humidity increases to 91%, making the air feel even chillier. For more details, visit Arhus weather in December.
As September rolls into Århus, the weather begins to shift from the warm embrace of summer to a cooler, more temperate climate. The average temperatures settle into a comfortable rhythm, peaking at 24°C and dipping to a chilly 3°C, creating a pleasant contrast that invites outdoor exploration. However, this transitional month also brings with it increased humidity and a notable amount of rainfall, with about half the month experiencing precipitation, making it considerably wetter compared to the drier summer months. For those interested in understanding Århus's climate in greater detail, be sure to check out Arhus Climate.