Last updated: August 21, 2025
September in Aalborg, Denmark offers a blend of mild temperatures and refreshing humidity, making it a unique time for visitors. With a maximum temperature reaching 24°C (76°F) and an average of 14°C (57°F), the days can be pleasantly warm, though cool nights drop down to a minimum of 4°C (39°F). Rain is a frequent visitor, as 80 mm (3.1 in) falls over 13 days, creating a lush landscape. The relative humidity hovers around a high 85%, adding to the atmospheric charm of this vibrant city in early autumn.
As September ushers in the transition from summer to autumn in Aalborg, Denmark, temperatures begin to cool yet remain mild. With a minimum of 4°C (39°F) and an average of 14°C (57°F), the city maintains a pleasant warmth, complemented by peak daytime highs reaching 24°C (76°F). This striking range marks a notable shift from the summer's higher averages, but still allows for enjoyable outdoor activities, making it an ideal time for locals and visitors alike to relish the crisp air and changing foliage. While days gradually shorten, the vibrant climate offers a perfect backdrop for exploring Aalborg's charming streets and scenic landscapes before the chill of October sets in.
In September, Aalborg experiences a significant shift in precipitation, as the month sees an average of 80 mm (3.1 in) of rain over 13 days. This marks a continuation of the wetter conditions that began in August, where 96 mm (3.8 in) fell. The trend shows that as summer transitions to autumn, the rainfall tends to remain consistent, with September maintaining a level similar to the height of summer storms. Compared to the earlier months, September's precipitation reflects a notable shift in the climate, with moisture accumulation that prefaces the even wetter October, which averages 86 mm (3.4 in). This gradual increase in rainfall not only enhances the lush landscapes but also sets the tone for the approaching fall season, characterizing Aalborg's vibrant natural beauty during this time.
In September, Aalborg experiences a notable shift in humidity, reaching 85% as summer fades into autumn. This slight increase follows the warmer months, where humidity hovered around the 80% mark in August and July. Interestingly, September's level reflects a gradual trend of rising humidity that starts from the more comfortable figures seen in late spring, peaking during the colder months of October and November, which both return to 87%. This transition underscores the dampness typical of Northern Europe, as the city prepares for the crispness of autumn while still holding onto the lingering warmth of summer.
As September arrives in Aalborg, Denmark, the UV Index begins to reflect the gradual transition towards the cooler months. With a moderate UV Index of 5, residents and visitors are encouraged to enjoy outdoor activities while being mindful of sun exposure, which requires a burn time of around 30 minutes. This marks a slight decrease from the peak summer months, where the index reached 7, but still calls for caution as the sun's rays remain potent. The pattern seen from May through August showcases a distinctly high exposure category; however, blue skies and sunny days in September still warrant sun protection. As we move into autumn, the UV Index will continue to drop, reminding us of the changing seasons ahead. For more detailed information, visit the Aalborg UV Index.
UV Risk Categories
In September, Aalborg, Denmark, basks in a delightful return of sunshine, with 309 hours illuminating the month—a notable shift from the summer's peak yet still offering a warm, golden glow. As the vibrant days of July and August give way to the soft embrace of autumn, the reduction in sunlight is part of a broader seasonal trend. The city transitions from June and July's impressive high of nearly 468 hours to the more mellow September, marking a gradual descent as days grow shorter heading into the chill of October. This month provides a perfect balance, allowing residents and visitors to relish outdoor festivities and the changing foliage, all while anticipating the coziness of fall and winter that looms ahead.
In Aalborg, Denmark, September ushers in a transitional phase as summer wanes and autumn approaches. With a 28% chance of sunny weather, the likelihood of enjoying bright, clear skies decreases compared to the summer months. Following the sunny peaks of April at 63% and the more moderate summer months of June and July, September marks a decline, suggesting that while sunny days are still possible, they become less frequent as the season progresses. This trend reflects a broader pattern of fluctuating sunshine throughout the year, offering a gentle reminder of nature's shifts and the inevitable approach of the cloudier winter months.
As September unfolds in Aalborg, Denmark, daylight begins to wane, transitioning from the vibrant summer months. Following the peak of 17 hours in June and July, the days gradually shorten, providing 15 hours in August and dropping to 12 hours by the time September arrives. This month serves as a gentle reminder of the approaching autumn, where daylight, while still generous, signals a shift towards the cozy evenings ahead. The trend highlights a consistent pattern of diminishing light as the year progresses, laying the foundation for the more subdued hours of October and November that follow. Embrace the lingering daylight; it won’t be long before the long winter nights set in.
In Aalborg, Denmark, the arrival of September heralds a gentle transition in wind dynamics. This month sees an average wind speed of 3.7 m/s (8 mph), slightly lower than the breezy peaks of summer but reminiscent of earlier spring conditions. As the year progresses, wind speeds exhibit a noticeable rhythm—the months of October and November tend to ramp up, reaching 4.6 m/s (10 mph) and 4.4 m/s (10 mph) respectively, while the summer months consistently linger around the 3.5 to 4.1 m/s range. This pattern suggests that, while September's winds may be mild and calming, the impending autumn will bring a refreshing increase, preparing Aalborg for the bluster of winter ahead.
Weather in Aalborg varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Aalborg, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. In September, temperatures range from a mild 4°C (39°F) at night to a pleasant 24°C (76°F) during the day, making it a much warmer month overall with an average temperature of 14°C (57°F). The month experiences around 80 mm (3.1 in) of precipitation over approximately 13 days, with humidity levels sitting at 85%. In contrast, January is significantly cooler, with temperatures dipping as low as -11°C (13°F) at night and only reaching a maximum of 10°C (51°F) during the day, resulting in an average temperature of just 3°C (37°F). This winter month has less precipitation, totaling 42 mm (1.7 in) over about 9 days, but with slightly higher humidity at 88%. For more details on January's weather, you can visit Aalborg weather in January.
September and February exhibit contrasting weather patterns in terms of temperature and precipitation. September offers milder conditions with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 24°C (76°F), while February experiences much colder weather, with temperatures dropping as low as -12°C (10°F) and only peaking at 13°C (55°F). Although September receives more precipitation at 80 mm (3.1 in) over 13 days, February still has notable rainfall at 55 mm (2.2 in) over 11 days, coupled with higher humidity levels in both months—85% in September and 87% in February. For more details, you can check Aalborg weather in February.
In comparing the weather of September and March, it is evident that September enjoys milder temperatures with a minimum of 4°C (39°F), an average of 14°C (57°F), and a maximum reaching 24°C (76°F). In contrast, March experiences colder conditions, where the minimum dips to -10°C (15°F) and the average temperature is only 4°C (39°F), with a maximum that aligns with September's average at 14°C (57°F). Additionally, September sees higher precipitation at 80 mm (3.1 in) over 13 days, while March has 60 mm (2.4 in) of rain across 11 days, making it slightly less rainy overall. The humidity is similar in both months, with September at 85% and March at 86%. For a detailed overview of typical conditions, you can check Aalborg weather in March.
September and April present distinct weather profiles, reflecting the transition between summer and autumn, and the shifting conditions of spring, respectively. In September, the temperatures range from a minimum of 4°C (39°F) to a pleasant maximum of 24°C (76°F), with an average of 14°C (57°F). This month also sees higher precipitation at 80 mm (3.1 in) across approximately 13 days and maintains a humidity level of 85%. In contrast, April experiences colder temperatures, with a minimum of -5°C (23°F) and an average of 7°C (45°F), but can still reach a maximum of 24°C (75°F). Precipitation is lighter at 38 mm (1.5 in) over about 8 days, and humidity is slightly lower at 84%. For a more detailed look at the weather in April, you can check Aalborg weather in April.
In September, the weather features a broader temperature range, with nighttime lows of 4°C (39°F) and daytime highs reaching up to 24°C (76°F), resulting in an average of 14°C (57°F). This month experiences significant precipitation, with 80 mm (3.1 in) falling over 13 days, and humidity levels are high at 85%. In contrast, May offers slightly cooler average temperatures, with lows of 0°C (33°F) and highs of 26°C (79°F), averaging around 11°C (53°F). Precipitation is also prevalent but slightly less, at 72 mm (2.8 in) over 12 days, and humidity is lower at 79%. For more details about May weather, check Aalborg weather in May.
When comparing the weather in September to that in June, it's clear that September tends to be cooler, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 24°C (76°F), while June offers warmer conditions with a minimum of 7°C (44°F) and a maximum of 27°C (81°F). Additionally, September experiences more precipitation, with about 80 mm (3.1 in) falling over approximately 13 days, compared to June's 71 mm (2.8 in) over 11 days. Interestingly, humidity levels are higher in September at 85%, compared to June's 77%, contributing to a different feel in the air. For more details on June weather, you can check Aalborg weather in June.
September and July present quite different weather patterns, with September generally being cooler and more humid. In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 24°C (76°F), averaging around 14°C (57°F). The month sees significant humidity at 85% and experiences 80 mm (3.1 in) of precipitation over 13 days. In contrast, July boasts warmer temperatures, with a minimum of 8°C (46°F) and a maximum of 29°C (85°F), averaging 17°C (63°F). July also receives a similar amount of rainfall, 80 mm (3.2 in), across the same number of days, but the humidity is slightly lower at 78%. For a more detailed look, you can check Aalborg weather in July.
In comparing the weather between September and August, September tends to be cooler with a minimum temperature of 4°C (39°F) compared to August's 7°C (45°F). The average temperature in September is 14°C (57°F), which is noticeably lower than August's average of 17°C (62°F). Additionally, the maximum temperature in September reaches 24°C (76°F), while August can see highs of up to 30°C (86°F).
Precipitation is relatively similar, with September receiving 80 mm (3.1 in) over 13 days, while August has slightly higher precipitation at 96 mm (3.8 in) across 15 days. Humidity levels are slightly higher in September at 85% compared to 80% in August. For more detailed information about August weather, you can visit Aalborg weather in August.
September and October present a notable transition in weather patterns. In September, temperatures range from a mild 4°C (39°F) at night to a pleasant 24°C (76°F) during the day, with an average of 14°C (57°F). The month experiences approximately 80 mm (3.1 in) of precipitation over 13 days, and humidity levels sit at around 85%. In contrast, October brings cooler temperatures, with nighttime lows dropping as low as -2°C (29°F) and an average of 10°C (50°F), while daytime highs reach up to 22°C (71°F). Precipitation slightly increases to 86 mm (3.4 in) over 14 days, accompanied by a slight rise in humidity to 87%. For more detailed information, check out Aalborg weather in October.
September weather in Aalborg is characterized by milder temperatures, with a minimum of 4°C (39°F) and an average of 14°C (57°F), reaching a pleasant maximum of 24°C (76°F). The month experiences about 80 mm (3.1 in) of precipitation over around 13 days, contributing to a relatively humid environment with 85% humidity. In contrast, November brings a significant drop in temperatures, with a minimum of -5°C (24°F) and an average of 6°C (44°F), peaking at 16°C (62°F). Rainfall is less frequent, totaling 49 mm (1.9 in) over 11 days, while humidity slightly increases to 87%. For more information about the specific weather conditions in November, visit Aalborg weather in November.
The weather in September and December presents a stark contrast, showcasing the shift from mild autumn to the chill of winter. In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 24°C (76°F), with an average of 14°C (57°F). Precipitation is relatively high at 80 mm (3.1 in) over 13 days, accompanied by a humidity level of 85%. In contrast, December experiences a significant drop in temperature, with lows reaching -8°C (17°F) and a maximum of 11°C (52°F), averaging just 3°C (38°F). Although precipitation is slightly lower in December at 62 mm (2.5 in) over the same amount of days, humidity remains consistent at 85%. For more detailed information, you can visit Aalborg weather in December.
As September unfolds in Aalborg, the weather marks a transition into autumn, offering a blend of temperate days and crisp evenings. Unlike the warmer summer months, daytime temperatures are more moderate, often hovering around a comfortable average that invites outdoor exploration. However, with about half the month experiencing rainfall, its characteristic humidity can make the air feel quite heavy. This shift in climate not only highlights the dynamic nature of Aalborg's weather but also sets the stage for the stunning fall foliage to follow. For a more detailed look at how Aalborg's weather shapes the seasons, check out Aalborg Climate.