Last updated: August 27, 2025
Vaesteras, Sweden, in September presents a varied climate, with maximum temperatures reaching 25°C (78°F) and an average of 12°C (54°F). Visitors can expect minimum temperatures dropping to -2°C (29°F), making it wise to pack layers. The month witnesses 61 mm (2.4 in) of precipitation spread over 10 rainy days, contributing to the region's average humidity of 83%. This blend of cooler days and occasional showers creates a refreshing atmosphere, ideal for those seeking a crisp autumn experience in this charming Swedish city.
As September rolls into Västerås, Sweden, the warmth of summer begins to wane, marking a transition into the cool embrace of autumn. With average temperatures settling at 12°C (54°F), residents experience a refreshing chill, complemented by daily highs reaching up to 25°C (78°F). Mornings start with crisp air, dipping to a minimum of -2°C (29°F), hinting at the impending winter. This month beautifully balances invigorating days with cool evenings, making it an ideal time for outdoor activities amidst the changing foliage. As the days grow shorter, the temperature trend serves as a reminder of the fluctuating seasons, with Västerås gracefully shifting from the lingering summer warmth to the crisp clarity of fall.
September in Västerås, Sweden, continues the trend of the late summer months with a significant precipitation level of 61 mm (2.4 in), similar to May's rainfall. Notably, September experiences 10 rainy days, marking a transition as autumn sets in and the weather becomes increasingly variable. This volume mirrors the wet conditions of August, which recorded 80 mm, reflecting a pattern where late summer often brings higher rainfall. As the year progresses, precipitation starts to heighten in October with 74 mm, suggesting that the region prepares for the more pronounced rains of autumn. The steady increase in precipitation from the warmer months hints at the seasonal shift, as Västerås gears up for the cooler, wetter days ahead.
As summer transitions into fall, September in Västerås, Sweden experiences a notable shift in humidity, with levels rising to 83%. This marks an increase compared to the drier summer months of June (69%) and July (67%), signaling the approach of the wetter autumn season. August, with its humidity at 72%, offers a gentle prelude to the more humid conditions that characterize the coming months. As temperatures begin to cool, the humidity increasingly mirrors the dampness of the winter, where levels peak again at 91% in both January and November. This trend from the relatively comfortable summer to the more humid fall underscores Västerås’s unique climatic rhythm, blending seasonal shifts with atmospheric moisture.
As summer fades into autumn, Vaesteras experiences a noticeable shift in UV exposure. In September, the UV Index drops to 4, placing it in the moderate exposure category, with a burn time of just 30 minutes—a slight decline from the high levels of July and August. This trend highlights the transition from the intense summer sun, where protection is especially crucial, to the milder autumn rays. As temperatures cool and days shorten, it's wise to remain vigilant about sun safety, especially during midday hours. For more detailed insights, check out the Vaesteras UV Index.
UV Risk Categories
As September arrives in Västerås, Sweden, the lingering warmth of summer begins to wane, bringing with it a noteworthy 290 hours of sunshine. This month stands out as a transitional period, witnessing a significant reduction from the sun-drenched days of July and August, which boasted 474 and 396 hours respectively. The gradual decline highlights an overarching trend: the steady march from peak summer brightness to the more subdued autumn light. September’s sunshine serves as a gentle reminder of the fleeting warmth, offering residents a final chance to bask in sunlight before the colder months set in, characterized by the sharper drop to 203 hours in October and just 120 hours in November.
In Västerås, Sweden, September brings a noticeable shift in weather patterns, with a 25% chance of sunny days. This marks a decline from the summer months of July and June, which boast chances as high as 50% and 46%, respectively. As autumn approaches, the likelihood of sunshine dips, reflecting the transition towards cooler temperatures and more overcast skies. Comparatively, September's sun probability sits lower than both April’s 48% and August’s 34%, signaling that while the days may still offer some warmth, the incessant sunlight of summer is waning. Embracing the natural beauty of Västerås in early autumn, visitors can anticipate a mix of mild days, yet should prepare for the increasing cloud cover that accompanies the season's change.
As summer wanes in Vaesteras, Sweden, September brings a gentle transition from the long days of July and August, offering a respectable 12 hours of daylight. This marks a gradual decline from the peak of 18 hours in June, showcasing a trend where daylight diminishes steadily as the autumn months approach. The shift from 17 hours in July to 15 hours in August sets the stage for September's daylight, indicating nature's rhythm as it prepares for the shorter days ahead. As the vibrant hues of fall emerge, residents can still relish ample daylight before it further recedes into October's 10 hours, signaling the forthcoming embrace of winter's charm.
In September, the winds in Västerås, Sweden continue to blow gently, with an average speed of 3.3 m/s (7 mph), slightly higher than the calm of the summer months. This transitional period marks a shift as the wind begins to pick up, reminiscent of the upcoming autumn breezes. The consistent wind speeds from the preceding summer help ease into the more invigorating gusts of October, which average at 3.9 m/s (9 mph). As the year progresses, September stands out as a bridge between the serene summer and the brisk vitality of autumn, maintaining a balance that invites outdoor activities while hinting at the seasonal changes ahead. Overall, the wind in September offers a pleasant and refreshing experience, setting the stage for the winds to come.
Weather in Vaesteras varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Vaesteras, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present a stark contrast in weather conditions. In September, temperatures range from a chilly -2°C (29°F) at night to a pleasant 25°C (78°F) during the day, with an average of 12°C (54°F). With 61 mm (2.4 in) of precipitation over about 10 days, the humidity hovers around 83%, contributing to a mild, somewhat humid atmosphere. Conversely, January plunges into the heart of winter, where temperatures can drop as low as -25°C (-12°F) at night and only reach a maximum of 10°C (50°F) during the day, averaging -1°C (31°F). The month sees less precipitation at 36 mm (1.4 in) over 7 days, but the humidity rises to 91%, creating an even colder feel. For a more detailed look at what to expect, you can visit Vaesteras weather in January.
September and February exhibit stark differences in weather patterns. In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 25°C (78°F), with an average of 12°C (54°F). The humidity sits at a moderate 83%, and the month experiences around 61 mm (2.4 in) of precipitation over 10 days. In contrast, February is much colder, with temperatures dipping to a minimum of -18°C (0°F) and peaking at 12°C (54°F), resulting in an average of -1°C (30°F). The month is drier, with only 32 mm (1.3 in) of precipitation over 7 days, and a slightly higher humidity level of 89%. For more detailed insights, you can check Vaesteras weather in February.
In comparing the weather between September and March, there's a notable shift in temperatures and conditions. September experiences milder temperatures, with a minimum of -2°C (29°F) and an average of 12°C (54°F), peaking at 25°C (78°F). In contrast, March starts off much chillier, with a minimum temperature of -16°C (4°F) and an average of only 2°C (35°F), though it can reach a maximum of 18°C (65°F). Precipitation is slightly higher in September, averaging 61 mm (2.4 in) over about 10 days, compared to March's 39 mm (1.5 in) across 8 days. Humidity levels are also elevated in March at 88%, compared to 83% in September. For more details on the weather conditions in March, you can visit Vaesteras weather in March.
In comparing the weather of September and April, notable differences emerge. September typically boasts a more moderate temperature range, with minimums around -2°C (29°F), an average of 12°C (54°F), and a maximum reaching 25°C (78°F). In contrast, April experiences cooler temperatures, featuring minimums of -10°C (15°F), an average of just 5°C (42°F), and a peak of 24°C (75°F).
Additionally, September sees a higher total precipitation of 61 mm (2.4 in) over approximately 10 days, compared to April's 30 mm (1.2 in) spread over 6 days, leading to slightly less overall wet weather in the spring month. Humidity levels are fairly similar, with September at 83% and April at 82%, indicating a generally moist atmosphere in both months. For more detailed information about April's weather, check out Vaesteras weather in April.
When comparing the weather in September and May, it's evident that both months experience mild temperatures and similar levels of precipitation. September typically sees a minimum temperature of -2°C (29°F) and an average of 12°C (54°F), while May, although slightly cooler with a minimum of -5°C (23°F) and an average of 11°C (52°F), can reach a higher maximum of 29°C (85°F). Both months receive about 61 mm (2.4 in) of precipitation over 10 days, but September has higher humidity at 83% compared to May's 71%. For a more detailed look at the weather in May, you can visit Vaesteras weather in May.
Comparing the weather of September and June reveals notable differences. In September, temperatures range from a chilly minimum of -2°C (29°F) to a pleasant maximum of 25°C (78°F), with an average of 12°C (54°F). The month sees about 61 mm (2.4 in) of precipitation over 10 days, accompanied by a high humidity level of 83%. In contrast, June brings warmer conditions, with a minimum of 4°C (40°F), an average of 17°C (63°F), and a maximum reaching 32°C (90°F). Although June experiences slightly less precipitation at 59 mm (2.3 in), it typically has 9 rainy days and a lower humidity level of 69%. For more details about June weather, you can visit Vaesteras weather in June.
When comparing the weather in September and July, notable differences emerge. September experiences cooler temperatures, with a minimum of -2°C (29°F) and an average of 12°C (54°F), while July boasts warmer conditions, with temperatures ranging from a minimum of 6°C (44°F) to an average of 18°C (65°F) and reaching a maximum of 33°C (92°F). Precipitation levels are similar, with September receiving 61 mm (2.4 in) over 10 days and July slightly lower at 57 mm (2.2 in) over 11 days. Additionally, September has higher humidity at 83%, compared to July's 67%. For more detailed weather insights, check out Vaesteras weather in July.
In comparing the weather between September and August, September tends to be cooler with a minimum temperature of -2°C (29°F) and an average of 12°C (54°F), while August provides warmer temperatures, with a minimum of 3°C (39°F) and an average of 17°C (62°F). August also boasts higher maximum temperatures, reaching up to 31°C (87°F), compared to September's peak of 25°C (78°F). Precipitation is slightly less in September at 61 mm (2.4 in) over 10 days, while August sees a total of 80 mm (3.1 in) over 12 days, indicating a wetter month. Moreover, September exhibits higher humidity levels at 83%, compared to August's 72%. For a detailed look at August's weather, visit Vaesteras weather in August.
In September, the weather in Vaesteras is generally milder, with average temperatures ranging from a minimum of -2°C (29°F) to a maximum of 25°C (78°F), and total precipitation measuring 61 mm (2.4 in) over about 10 days. The humidity during this month sits at a comfortable 83%. In contrast, October brings cooler temperatures, with an average low of -5°C (23°F) and a high of only 20°C (69°F). Rainfall increases slightly to 74 mm (2.9 in) across 12 days, and humidity rises to 89%, making the air feel even chillier. For more details on October weather in this region, check out Vaesteras weather in October.
September and November present notably different weather conditions. In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 25°C (78°F), with an average of 12°C (54°F). The month sees around 61 mm (2.4 in) of precipitation across 10 days and humidity levels averaging 83%. In contrast, November brings much colder temperatures, with lows reaching -14°C (8°F) and a maximum of 16°C (60°F), averaging at just 3°C (38°F). Precipitation decreases to 47 mm (1.8 in) over 9 days, while humidity rises to 91%. For more detailed weather information, you can visit Vaesteras weather in November.
In September, the weather in Vaesteras tends to be relatively mild, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 25°C (78°F), and an average temperature of around 12°C (54°F). The month experiences about 61 mm (2.4 in) of precipitation over roughly 10 days, contributing to a humidity level of 83%. In contrast, December brings much colder conditions, with temperatures dropping significantly, featuring a minimum of -19°C (-1°F) and a maximum of only 10°C (50°F), yielding an average temperature of 0°C (32°F). Precipitation is slightly lower at 57 mm (2.2 in), but it occurs over 13 days, and humidity rises to 90%. For more specific details about the weather during this winter month, check out Vaesteras weather in December.
As September unfolds in Västerås, it marks a noticeable transition from the warmth of summer to the crispness of autumn. With temperatures dipping and averaging around 12°C (54°F), this month brings a refreshing chill that contrasts sharply with the heat of the previous months. Rainfall becomes more frequent, with about 10 days of precipitation, contributing to a humidity level of 83% that adds to the seasonal ambiance. It's a time when nature begins to show its vivid autumn colors, making it a beautiful yet stark departure from the long, warm days of July and August. For a deeper understanding of what to expect throughout the year, check out Vaesteras Climate.