Last updated: August 27, 2025
September in Stockholm brings a mild and dynamic climate, characterized by a maximum temperature reaching 25°C (77°F), balancing toward an average of 13°C (55°F) and dipping as low as 0°C (33°F). While the city enjoys pleasant weather, it also anticipates 50 mm (2.0 in) of rainfall spread across approximately 9 days, contributing to an overall humidity level of around 85%. Visitors and locals alike can expect a blend of sunny spells and occasional showers, making this month a transitional delight for exploring the vibrant streets and scenic waterfronts of Sweden's capital.
As September arrives in Stockholm, the city transitions into a delightful early autumn, with temperatures that begin to hint at the chill of winter. The month showcases a gentle shift, featuring a minimum of 0°C (33°F) and climbing to a pleasant average of 13°C (55°F) during the day. With maximum temperatures peaking at 25°C (77°F), September offers a brief respite from the summer heat, allowing for beautiful, crisp outdoor adventures. The days remain relatively mild compared to the bleak winters, setting the stage for vibrant fall foliage and cozy urban explorations, making it a perfect time to experience the city's charm before the colder months set in.
September in Stockholm sees a moderate precipitation level, with an average of 50 mm (2.0 in) of rain falling over 9 days. This slight drop from August, which recorded the highest monthly total of 67 mm, marks a transition as the city heads into the more autumnal months. The increased rainfall earlier in the summer suggests that Stockholm's vibrant greenery continues to thrive, but as fall approaches, this balanced precipitation sets the stage for crisp air and the onset of colorful foliage. Interestingly, the trend shows that while August tends to peak in rainfall, September maintains a substantial amount, providing valuable moisture for the changing season.
As summer wanes and autumn approaches, September in Stockholm experiences a notable shift in humidity levels. With an average humidity of 85%, the city begins to transition from the drier months of July and August, which recorded a low of 74% and 77%, respectively. This rise in humidity reflects the cooling temperatures and increased precipitation characteristic of the fall season, as October and November follow closely behind with humidity levels climbing back to 89% and 90%. The return to higher humidity in September serves as a reminder of the Mediterranean-like climate that characterizes Sweden’s capital throughout the year, where moisture is never entirely absent.
As the summer wanes and September unfolds in Stockholm, the UV Index drops to a moderate 4, suggesting it's time to enjoy the pleasant weather while being mindful of sun exposure. With a burn time of 30 minutes, this month sees a gradual transition from the high index values of July and August, where outdoor activities required more caution. As autumn approaches, the UV levels remain higher than in the early months of the year, such as January and February, when the index is notably low. Embrace the lingering warmth of early fall but remember to protect your skin during peak hours. For more detailed information, check the Stockholm UV Index.
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As summer gracefully transitions into autumn, September in Stockholm sees a noteworthy reduction in daylight, offering 309 hours of sunshine. While this is a significant drop from the sun-drenched days of July, which boasts the peak with 487 hours, September still benefits from a generous amount of light compared to the upcoming months. This month marks the gradual shift from summer’s vibrancy, as daylight slowly wanes into the cooler embrace of fall, feeling brighter than January’s mere 72 hours of sunlight. Visitors and residents alike can enjoy the last warm hues of the year, making it a picturesque time to experience the city’s charm before the darker days arrive.
In Stockholm, September brings a notable decline in sunshine, with only a 26% chance of sunny weather. This marks a stark contrast to the vibrant days of summer, particularly in July when the sun shines for about 55% of the time. As autumn approaches, the likelihood of overcast skies gradually increases, with seasonal patterns indicating that the summer's warmth gives way to cooler, cloudier conditions. While September may not be the sunniest month, it still offers glimpses of light amidst the transitioning landscape, inviting residents and visitors alike to embrace the beauty of autumn's arrival.
As summer fades, September in Stockholm ushers in a gentle decline in daylight, offering approximately 12 hours of sunlight. This month marks a notable transition from the long, vibrant days of summer, where June splashed the city with a remarkable 18 hours of daylight. Following this peak, daylight gradually wanes, dropping to 15 hours in August and further to 12 hours by September. This steadier rhythm not only highlights the shift towards autumn but also reflects the city's adaptation to the changing seasons, as daylight ebbs and flows throughout the year. The gradual decrease prepares residents for the cozy embrace of fall, with shorter days and the charm of the seasonal transition ahead.
As summer gives way to autumn, September in Stockholm experiences a gentle uptick in wind speed, averaging 3.8 m/s (9 mph). This shift marks a transition from the lighter breezes of summer months, which see their lowest speeds in June and July at 2.8 m/s (6 mph) and 3.2 m/s (7 mph) respectively. As the year progresses, wind speeds gradually increase, reaching 4.6 m/s (10 mph) in October, indicating the onset of stronger gusts as autumn settles in. The overall trend suggests a gradual intensification of wind as the seasons change, providing a refreshing air that complements the vibrant hues of September foliage.
Weather in Stockholm varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Stockholm, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Stockholm is relatively mild, with average temperatures around 13°C (55°F) and maximums reaching up to 25°C (77°F). Humidity levels are high at 85%, with precipitation occurring on about 9 days, totaling 50 mm (2.0 in). In contrast, January is much colder, with an average temperature of 0°C (32°F) and maximums only reaching 10°C (51°F). The coldest nights can drop to -18°C (-1°F). Rain is less frequent, with only 38 mm (1.5 in) of precipitation over 8 days, but humidity is slightly higher at 90%. For more detailed information, you can check Stockholm weather in January.
September and February in Stockholm showcase contrasting weather patterns. September enjoys milder temperatures, with an average of 13°C (55°F) and a maximum of 25°C (77°F), whereas February sees colder conditions, with an average of -1°C (31°F) and a maximum of just 11°C (53°F). Although both months experience a similar number of rainy days—September with 9 days and February with 8—the total precipitation is slightly lower in February at 34 mm (1.3 in) compared to September's 50 mm (2.0 in). Humidity remains high in both months, with September at 85% and February at 88%. For more details, check out Stockholm weather in February.
September and March showcase contrasting weather patterns in terms of temperature and humidity. In September, the temperatures range from a minimum of 0°C (33°F) to a maximum of 25°C (77°F), with an average of 13°C (55°F). The month experiences about 50 mm (2.0 in) of precipitation over 9 days and has a humidity level of 85%. In contrast, March presents a colder climate, with temperatures dipping as low as -13°C (10°F) and peaking at 17°C (64°F), averaging just 2°C (35°F). It has slightly lower precipitation at 43 mm (1.7 in) over 8 days, while humidity is marginally higher at 89%. For more details on what to expect during this chilly month, check out Stockholm weather in March.
September and April present contrasting weather patterns in terms of temperature and precipitation. In September, temperatures range from a cool 0°C (33°F) at night to a comfortable maximum of 25°C (77°F) during the day, offering a pleasant average of 13°C (55°F). The humidity remains high at 85%, with relatively more rainfall totaling 50 mm (2.0 in) over 9 days. In comparison, April experiences lower overall temperatures, with a minimum of -8°C (18°F) and an average of just 5°C (41°F), peaking at 22°C (72°F). The month is drier, with only 25 mm (1.0 in) of precipitation across 7 days, but maintains the same humidity level of 85%. For a deeper dive into April's weather, you can check out Stockholm weather in April.
In comparing the weather between September and May, both months exhibit a similar maximum temperature, reaching around 25°C (77°F). However, September typically boasts a higher average temperature of 13°C (55°F), while May averages slightly cooler at 10°C (50°F). Precipitation levels are relatively close, with September seeing 50 mm (2.0 in) over 9 days and May recording 52 mm (2.1 in) over 11 days. Humidity in September is notably higher at 85%, compared to 77% in May. For more detailed information, you can visit Stockholm weather in May.
September and June in Stockholm offer a contrast in weather as the seasons shift. In September, the temperatures range from a minimum of 0°C (33°F) to a maximum of 25°C (77°F), with an average of 13°C (55°F). The month sees around 50 mm (2.0 in) of precipitation over approximately 9 days, coupled with high humidity at 85%. In comparison, June presents warmer temperatures with a minimum of 5°C (42°F) and a maximum of 27°C (81°F), averaging 16°C (61°F). The rainfall in June is slightly less at 49 mm (1.9 in) over about 8 days, and the humidity is lower at 76%. For more detailed insights into June's weather, you can visit Stockholm weather in June.
September in Stockholm is generally cooler than July, with temperatures ranging from a chilly 0°C (33°F) at night to a pleasant 25°C (77°F) during the day, averaging 13°C (55°F). This month experiences higher humidity at 85% and receives about 50 mm (2.0 in) of precipitation over 9 days. In contrast, July is warmer, with temperatures fluctuating between 8°C (47°F) and a high of 29°C (85°F), resulting in an average temperature of 18°C (64°F). July sees slightly more rainfall at 55 mm (2.2 in) but has lower humidity at 74%. For a more detailed overview of July weather, check out Stockholm weather in July.
In comparing the weather between September and August, we can see notable differences in temperature and precipitation. September experiences cooler temperatures, with a minimum of 0°C (33°F) and an average of 13°C (55°F), while August is warmer, with a minimum of 5°C (41°F) and an average of 17°C (63°F). The maximum temperatures also reflect this trend, reaching 25°C (77°F) in September compared to 29°C (85°F) in August. Precipitation levels are slightly lower in September, totaling 50 mm (2.0 in) over 9 days, compared to August's 67 mm (2.6 in) over 12 days. Humidity is higher in September at 85%, compared to August's 77%. For more specific details about August weather in Stockholm, check out Stockholm weather in August.
In September, temperatures in the area generally ranged from a minimum of 0°C (33°F) to a maximum of 25°C (77°F), with an average of 13°C (55°F). The month saw about 50 mm (2.0 in) of precipitation over 9 days, and humidity levels hovered around 85%. In contrast, October brings a noticeable drop in temperatures, with lows reaching -3°C (27°F) and highs capped at 17°C (63°F), averaging just 8°C (47°F). Rainfall increases to 65 mm (2.6 in) over 12 days, and humidity rises slightly to 89%. For a closer look at how the weather evolves throughout October, you can check out Stockholm weather in October.
In September, the weather in Stockholm is generally milder, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 25°C (77°F) and an average of 13°C (55°F). The month experiences around 50 mm (2.0 in) of precipitation over approximately 9 days, accompanied by high humidity levels of 85%.
Contrastingly, November brings colder temperatures, with a minimum of -11°C (13°F) and a maximum of 14°C (58°F), resulting in an average of 4°C (40°F). Despite slightly lower precipitation at 43 mm (1.7 in), it also falls over 9 days, and the humidity rises to 90%. For more details on the conditions you can expect, check out Stockholm weather in November.
September and December present a stark contrast in weather conditions. In September, temperatures range from a minimum of 0°C (33°F) to a comfortable maximum of 25°C (77°F), with an average of 13°C (55°F). The month experiences around 50 mm (2.0 in) of precipitation over 9 days, accompanied by high humidity at 85%. In contrast, December brings much colder temperatures, with a minimum of -15°C (6°F) and a maximum of just 9°C (49°F), averaging around 1°C (34°F). The precipitation increases slightly to 61 mm (2.4 in), occurring over 14 days, while humidity remains high at 87%. For more detailed insights into December weather, you can visit Stockholm weather in December.
As summer bids farewell, September in Stockholm ushers in a transition to cooler temperatures and increased humidity, making it a unique month in the city’s climate calendar. With average temperatures settling around 13°C, you can expect refreshing days, though chillier nights might remind you that autumn is on the horizon. While the occasional rainfall occurs—spreading across roughly nine days with a total precipitation of about 50 mm—this month generally offers a more stable weather pattern compared to the unpredictability of the earlier summer months. For those looking to explore the vibrant autumnal hues, September is an enchanting time to experience Stockholm's evolving landscape. To learn more about the city's climate variations throughout the year, visit Stockholm Climate.