Last updated: August 27, 2025
In September, Uppsala, Sweden experiences a delightful transition into autumn, showcasing a maximum temperature of 26°C (79°F) while the average settles at a comfortable 12°C (54°F). As the warmth of summer fades, the weather can dip to a brisk -1°C (31°F) at times, reminding residents of the approaching cold season. The month brings 52 mm (2.0 in) of precipitation over 9 days, contributing to lush landscapes. With an average humidity of 85%, the air feels fresh yet invigorating, inviting outdoor exploration amidst the captivating changes of the season.
In September, Uppsala, Sweden begins to transition from the warmth of summer to the cooler embrace of autumn. The temperatures reflect this shift, with nightly lows dipping to around -1°C (31°F) while daytime averages settle at a pleasant 12°C (54°F). With maximum temperatures reaching up to 26°C (79°F), the month still holds onto the remnants of summer, offering opportunities for outdoor activities amidst the changing colors of the leaves. As September unfolds, the air becomes crisp, hinting at the chill that will soon define the upcoming months, making it a time of both beauty and anticipation in this charming Scandinavian city.
September in Uppsala, Sweden sees a notable shift in precipitation patterns as summer gives way to autumn. With 52 mm (2.0 in) of rain spread over approximately 9 days, it marks a decrease from the wetter months of July and August, which averaged around 63 mm (2.5 in) and 69 mm (2.7 in) respectively. This transitional month hints at the changing season, offering a balance of rainfall that supports the lingering greenery while gradually preparing the landscape for the cooler months ahead. As October approaches, precipitation levels surge again to 69 mm (2.7 in), reflecting the trend of increased rainfall that is characteristic of the fall, suggesting that Uppsala's climate is as dynamic as its vibrant seasonal scenery.
In September, Uppsala experiences a notable shift in humidity, with levels hovering around 85%. As summer fades, the air retains more moisture, signaling a transition towards the wetter autumn months. This slight increase from July's low of 74% reflects a general trend of rising humidity that typically follows the summer season, culminating in a jump back to 89% by October. Overall, September acts as a bridge between the drier summer and the dampness of fall, setting a comfortable yet refreshing tone for the month as nature begins to prepare for the cooler, more humid days ahead.
As September rolls into Uppsala, Sweden, the UV Index settles at a moderate level of 4, signaling the need for sun protection during outdoor activities. This marks a gentle decline from the high readings of summer, where July and June peaked at 7. With a burn time of about 30 minutes, it's crucial to remain mindful of the sun's rays, particularly as days shorten and temperatures begin to cool. This transitional month reflects a pattern where UV levels drop from the summer’s peak, aligning with the overall trend of reduced exposure as autumn approaches. For a comprehensive understanding of UV patterns throughout the year, check out the Uppsala UV Index.
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As summer fades into autumn, September in Uppsala, Sweden, offers a delightful transition with 301 hours of sunshine. This month, while less sun-drenched than the peak summer months of June and July, still captures a vibrant glow, significantly brighter than the darker depths of winter. A steady decline in sunlight begins in earnest after the summer's peak, making September a charming reminder of the warmer days just past. With bright, clear days inviting outdoor exploration, this month serves as a graceful bridge between the lush greenery of summer and the impending chill of autumn, encapsulating the beauty of seasonal change in Uppsala.
In Uppsala, Sweden, the chances of basking in sunny weather during September are relatively modest, with only a 25% likelihood of sunshine. This reflects a noticeable dip from the peak sunshine months of July and June, which boast chances of 53% and 47%, respectively. Following the vibrant summer, September transitions into a cooler season where the sun makes fewer appearances, alongside August's 32% chance of sun. As the year progresses into autumn, the overall trend shows fluctuating potential for sunny days, with September marking a significant drop from the summer highs, leading residents to seek moments of warmth amidst the encroaching chill.
As summer fades into autumn, September in Uppsala, Sweden, brings a gentle decline in daylight, offering around 12 hours of light each day. Following the vibrant brightness of July, which boasts nearly 18 hours of sun, September marks a transition where days grow shorter, yet still retain a generous amount of illumination. This gradual decrease becomes more pronounced as October approaches, when daylight dips to 10 hours, making it clear that the long days of summer are well behind. Overall, September serves as a bridge between the exuberant light of summer and the shorter, cozier days of the approaching winter, inviting a unique blend of seasonal change and reflection.
As September graces Uppsala, the wind begins to pick up, offering a gentle average speed of 3.3 m/s (7 mph). This slight increase hints at the changing seasons, contrasting the calmer breezes of summer months, where June and July lingered at just 2.6 m/s and 2.8 m/s, respectively. Following a series of mild summer gusts, September carries a refreshing consistency in wind speed, setting the stage for the crisp autumn days ahead. Notably, this month's winds are comparable to those in both January and February, suggesting a close tie between the start of the seasons as temperatures cool and nature prepares for the winter ahead. With October on the horizon, a sharper rise to 4.1 m/s will soon invigorate the landscape, emphasizing the dynamic shifts that characterize Uppsala's weather.
Weather in Uppsala varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Uppsala, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures range from a minimum of -1°C (31°F) to a pleasant average of 12°C (54°F), peaking at a maximum of 26°C (79°F). The month sees about 52 mm (2.0 in) of precipitation over approximately 9 days, accompanied by a humidity level of 85%. In contrast, January experiences much colder temperatures, with a minimum of -23°C (-10°F) and an average of -1°C (31°F), peaking at only 10°C (50°F). This month has slightly less precipitation at 34 mm (1.3 in) over about 7 days but higher humidity at 90%. For a detailed look at January's weather, you can refer to Uppsala weather in January.
September and February exhibit stark contrasts in weather conditions. September enjoys a mild average temperature of 12°C (54°F), with maximums reaching 26°C (79°F), making it a pleasant month. Additionally, it experiences relatively higher precipitation at 52 mm (2.0 in) over 9 days, coupled with a humidity level of 85%. In contrast, February is much colder, with average temperatures hovering around -1°C (30°F) and maximums only reaching 11°C (52°F). It sees less precipitation at 32 mm (1.2 in) over 7 days, but higher humidity at 88%, contributing to a much more frigid atmosphere. For more details on February weather, you can visit Uppsala weather in February.
In comparing the weather between September and March, there are notable differences in temperature and overall climate conditions. September typically presents milder weather with average temperatures around 12°C (54°F), while March is considerably chillier, averaging just 1°C (34°F). The maximum temperatures in September can reach up to 26°C (79°F), contrasting sharply with March's peak of 18°C (65°F).
Precipitation levels are fairly similar, with September receiving about 52 mm (2.0 in) over 9 days and March experiencing slightly less at 39 mm (1.5 in) across 8 days. Humidity levels are also comparable, with September at 85% and March slightly higher at 89%. For a more detailed look at the weather specifics in March, you can visit Uppsala weather in March.
September and April present quite different weather patterns despite both experiencing high humidity levels of 85%. In September, temperatures range from a chilly minimum of -1°C (31°F) to a pleasant maximum of 26°C (79°F), with an average of 12°C (54°F). This month receives a bit more rainfall, totaling 52 mm (2.0 in) over approximately 9 days. In contrast, April tends to be cooler, with temperatures dipping down to -12°C (10°F) at night and reaching a daytime maximum of 23°C (74°F) but averaging only 5°C (41°F). Precipitation is less in April, totaling 29 mm (1.1 in) over about 7 days. For more details on April's climate, visit Uppsala weather in April.
When comparing the weather in September and May, we observe some notable differences. September sees a broader temperature range, with minimums around -1°C and maximums reaching up to 26°C, averaging at 12°C. In contrast, May's temperatures often dip slightly lower at a minimum of -6°C but can reach a maximum of 28°C, averaging 10°C. Precipitation levels are fairly similar, with September receiving 52 mm over 9 days and May experiencing 59 mm across 10 days, though May has slightly lower humidity at 77% compared to September's 85%. For more detailed insights into May's weather, you can check Uppsala weather in May.
September and June exhibit notable differences in weather conditions. In September, temperatures range from a chilly minimum of -1°C (31°F) to a comfortable maximum of 26°C (79°F), with an average of 12°C (54°F). This month sees precipitation of 52 mm (2.0 in) over approximately 9 days, accompanied by high humidity levels at 85%. In contrast, June enjoys milder temperatures, with a minimum of 3°C (38°F), an average of 16°C (62°F), and a peak of 30°C (87°F). Although it experiences slightly more precipitation at 60 mm (2.4 in) over 8 days, humidity is lower at 76%. For more detailed insights into June's weather patterns, check out Uppsala weather in June.
In comparing the weather between September and July, we see distinct differences in temperatures and precipitation patterns. September features a cooler temperature range, with minimums dipping to -1°C (31°F) and maxes reaching only 26°C (79°F), averaging around 12°C (54°F). The month experiences significant humidity levels at 85% and records about 52 mm (2.0 in) of precipitation over 9 days. In contrast, July is much warmer, with minimum temperatures of 5°C (42°F) and maximums soaring up to 32°C (90°F), averaging 18°C (64°F). However, July also has slightly higher precipitation at 63 mm (2.5 in) over 10 days and a lower humidity of 74%. For more detailed insights, you can visit Uppsala weather in July.
In comparing the weather between August and September, we notice a distinct shift towards cooler temperatures as summer transitions to autumn. September experiences a wider temperature range, with minimums dropping to -1°C (31°F) compared to August's minimum of 3°C (38°F). The average temperature in September is 12°C (54°F), significantly cooler than August's average of 17°C (62°F). Although September has a maximum temperature of 26°C (79°F), it is still lower than August's peak of 31°C (87°F). Precipitation also varies, with September receiving 52 mm (2.0 in) over 9 days, while August has a slightly higher total of 69 mm (2.7 in) over 12 days. Additionally, September's humidity rises to 85%, making it feel more humid than August's 77%. For a more detailed look at August weather specifically, you can refer to Uppsala weather in August.
In September, the weather is generally milder, with temperatures ranging from a minimum of -1°C (31°F) to a maximum of 26°C (79°F) and an average temperature of 12°C (54°F). The humidity is relatively high at 85%, and the month sees about 52 mm (2.0 in) of precipitation over 9 days. In contrast, October brings cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 19°C (67°F), leading to a lower average of 8°C (46°F). The month is also wetter, receiving 69 mm (2.7 in) of rain over 12 days, coupled with a slight increase in humidity to 89%. For more detailed information, you can check Uppsala weather in October.
September and November present notable differences in weather patterns. September enjoys a milder temperature range, with lows of -1°C (31°F) and highs reaching up to 26°C (79°F), while November's temperatures drop more significantly, with a minimum of -13°C (10°F) and a maximum of 15°C (59°F). Despite the relatively warmer September, it experiences higher average humidity at 85% compared to November's 90%. Additionally, while September sees 52 mm (2.0 in) of precipitation over 9 days, November brings slightly less rainfall at 41 mm (1.6 in) spread across 10 days. For more insights on November weather, visit Uppsala weather in November.
September weather in Uppsala exhibits a wider temperature range, with averages around 12°C (54°F) and maximums reaching 26°C (79°F), making it relatively mild. However, as the season shifts to December, temperatures drop significantly, averaging around 0°C (33°F) with maximums of only 9°C (49°F) and a chilling minimum of -16°C (3°F). Precipitation becomes slightly more frequent in December, occurring on 13 days compared to September's 9 days, though overall precipitation levels are similar. Humidity also increases, rising from 85% in September to 87% in December, contributing to a more frigid atmosphere. For more detailed information, you can visit Uppsala weather in December.
As September arrives in Uppsala, the transition from summer to autumn becomes evident, bringing a refreshing shift in weather patterns. With average temperatures dipping compared to the warmer months, days can still bask in pleasant sunlight, but the evenings take on a crisp chill. Rainfall becomes more frequent, with increased humidity enveloping the city, highlighting the characteristic fall ambiance. This blend of warm days and cooler nights makes September a unique month, ideal for enjoying the colorful changing leaves. For a deeper dive into Uppsala's climate, be sure to check out Uppsala Climate.