Last updated: August 27, 2025
September in Uddevalla, Sweden, brings a mild yet varied climate, showcasing a maximum temperature of 24°C (75°F) and an average of 13°C (55°F). As autumn approaches, temperatures can dip to a chilly 0°C (32°F). This month experiences frequent rainfall, with 101 mm (4.0 in) of precipitation over 14 days, creating a damp atmosphere accentuated by high humidity at 86%. Perfect for cozy indoor activities or brisk walks in nature, September offers a unique blend of warmth and coolness, inviting both locals and visitors to embrace the changing seasons.
In September, Uddevalla transitions from the lingering warmth of summer to the crisp beginnings of autumn. With temperatures ranging from a cool 0°C (32°F) at night to a pleasant max of 24°C (75°F) during the day, this month offers a delightful mix of mild conditions. The average temperature settles around 13°C (55°F), indicating a gentle descent from the sweltering heights of July and August. As daylight hours begin to shorten, the air gains a refreshing clarity that invites outdoor activities, making September an ideal time to explore the stunning natural landscapes of this coastal town. This gradual shift also heralds the arrival of fall foliage, adding vibrant colors to the already picturesque scenery.
In September, Uddevalla experiences a notable continuation of late-summer rain, accumulating 101 mm (4.0 in) of precipitation over 14 days. This amount represents a slight decrease from August's peak of 119 mm but remains part of a steady trend of substantial monthly rainfall that has characterized the region since the summer months. Interestingly, while both August and September see higher precipitation, the days of rain balance out, making for a relatively damp transition into the autumn months. As October approaches, precipitation levels are anticipated to slightly increase to 103 mm (4.1 in), maintaining the region's reputation for moody maritime weather. This pattern reflects the overall trend of increased rainfall typical for the autumn, highlighting a shift towards an even wetter climate ahead.
In September, Uddevalla experiences a noticeable increase in humidity, with levels reaching 86%. This marks a significant uptick from the drier summer months of June and July, which hovered around the low 70s. As autumn approaches, the transition in humidity is evident; it reflects the city's shift towards a wetter climate, echoing the higher levels seen in the later months of the year, like October and November, which typically maintain humidity in the low 90s. Overall, this rise suggests a refreshingly cool maritime environment that characterizes Uddevalla's early fall, as the lush landscapes prepare for the seasonal changes ahead.
As September unfolds in Uddevalla, Sweden, the UV Index reflects a noticeable shift towards moderate sun exposure, registering at 4. This marks a decline from the high indexes of summer, which peaked at 7 in both July and June, where the risk of skin damage was significantly elevated with only 25 minutes of burn time. The transition to autumn brings a safer environment for outdoor activities, with a recommended burn time of 30 minutes in September. As the days grow shorter and cooler, it's a great moment to enjoy the outdoors while remaining mindful of sun safety. For more detailed insight on daily conditions, you can check the Uddevalla UV Index.
UV Risk Categories
September in Uddevalla, Sweden, boasts a notable 306 hours of sunshine, marking a gentle decline from the sun-soaked days of summer. As the leaves begin to change, this month captures a sweet spot between the vibrant brightness of July and August, where sunny hours peaked at 479 hours and 411 hours, respectively. Yet, September's brightness reminds us that summer's warmth lingers just a bit longer, providing both a transition to autumn and a chance to relish the last rays of sun before the days grow shorter. This monthly variety showcases Uddevalla’s unique ability to balance sun and shadow, encapsulating the beauty of changing seasons.
In September, Uddevalla experiences a 27% chance of sunny weather, marking a slight decline from the warmer summer months. This dip follows a summer peak in June at 44%, reflecting the transition into autumn. Notably, September's sunshine likelihood is more aligned with the winter months than the vibrant spring, where peak sun probability can reach 51% in April. As the days shorten and the crisp air settles in, locals and visitors alike may find that while sunny days are less frequent, the early fall charm still offers its own unique beauty worth exploring.
As summer fades in Uddevalla, September brings a gentle transition with 12 hours of daylight. This marks a noticeable reduction from the 17 hours enjoyed in July and 15 hours in August, as the days become shorter heading into autumn. The month serves as a bridge between the vibrant, sun-soaked days of summer and the crisp, darker months ahead, presenting a balance of light that allows residents to savor the last hints of warmth before the daylight dwindles further to 10 hours in October. Overall, September reflects a shift towards the cozy, reflective seasons, inviting both relaxation and the anticipation of the colorful autumn foliage.
In September, the winds in Uddevalla settle into a gentle rhythm, averaging around 3.2 m/s (7 mph). This marks a slight increase from the summer months, where winds dipped to their lowest in July at 2.9 m/s. The transition into autumn brings a refreshing breeze, preparing the landscape for the coming chill. Interestingly, this month lies within a broader trend of fluctuating wind speeds throughout the year, especially as it follows a noticeable uptick in October, where speeds rise to 4.1 m/s (9 mph). Overall, September’s winds strike a harmonious balance, providing just enough vigor to herald the shift in seasons without overwhelming the serene beauty of Uddevalla’s shores.
Weather in Uddevalla varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Uddevalla, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, it is clear that these months present distinctly different climates. September enjoys milder temperatures, with averages around 13°C (55°F) and highs reaching up to 24°C (75°F), making it a pleasant time for outdoor activities. In contrast, January brings much colder conditions, with average temperatures plummeting to around 1°C (34°F) and maximums only reaching 9°C (49°F). Additionally, September experiences significantly more rainfall, totaling 101 mm (4.0 in) over 14 days, while January has less precipitation at 52 mm (2.0 in) over only 9 days. The humidity remains relatively high in both months, with September at 86% and January even higher at 94%. For more detailed information on the weather conditions during this cold winter month, you can visit Uddevalla weather in January.
September and February present two distinctly different weather experiences. In September, temperatures range from a chilly 0°C (32°F) at night to a pleasant 24°C (75°F) during the day, with an average of 13°C (55°F). This month also sees significant rainfall, totaling 101 mm (4.0 in) over about 14 days, and humidity levels reach a high of 86%. In contrast, February experiences much colder conditions, with temperatures dipping as low as -19°C (-2°F) at night and peaking at only 14°C (57°F), averaging around 0°C (33°F). The precipitation in February is relatively lower at 69 mm (2.7 in) over 10 days, accompanied by even higher humidity at 92%. For more detailed information, you can check Uddevalla weather in February.
When comparing the weather in September and March, noticeable differences emerge. September enjoys a milder temperature range, with average highs reaching 24°C (75°F) and lows around 0°C (32°F), coupled with an average humidity of 86% and considerable precipitation of 101 mm (4.0 in) over 14 days. In contrast, March presents a chillier climate, with average temperatures peaking at 14°C (58°F) and dipping to -14°C (7°F) at night. Although March experiences less precipitation at 68 mm (2.7 in) across 11 days, it features slightly higher humidity at 89%. For more detailed insights into the weather conditions in March, you can visit Uddevalla weather in March.
When comparing the weather in September and April, notable differences emerge in temperature and precipitation. September generally boasts milder temperatures, with an average of 13°C (55°F) and a maximum of 24°C (75°F), while April tends to be cooler, averaging 6°C (44°F) with highs reaching only 21°C (71°F). In terms of precipitation, September is wetter, receiving 101 mm (4.0 in) over 14 days, compared to April's 39 mm (1.5 in) over just 7 days. Humidity levels are also slightly higher in September at 86%, while April’s humidity is around 82%. For more details specific to Uddevalla, check this link: Uddevalla weather in April.
In comparing the weather of September and May, September tends to be slightly warmer overall, with average temperatures reaching up to 13°C (55°F) compared to May's average of 11°C (53°F). While both months see minimum temperatures around 0°C (32°F), September can peak at a comfortable 24°C (75°F), whereas May can rise even higher to 29°C (84°F). Precipitation is slightly heavier in September, with 101 mm (4.0 in) over about 14 days, compared to May, which has 75 mm (3.0 in) over 12 days. Additionally, September's humidity is higher at 86%, making it feel more muggy than May's relatively lower humidity of 73%. For more detailed insights into May weather, you can check Uddevalla weather in May.
In comparing the weather between September and June, September tends to be cooler, with average temperatures ranging from a chilly 0°C (32°F) to a pleasant 24°C (75°F), while June enjoys warmer conditions, with temperatures ranging from 5°C (42°F) to a maximum of 31°C (88°F). September also experiences greater humidity at 86%, compared to June's more moderate 71%. Additionally, September receives more precipitation over a longer span, totaling 101 mm (4.0 in) across 14 days, whereas June sees less rainfall at 76 mm (3.0 in) over just 10 days. For a closer look at what June holds in store, check out Uddevalla weather in June.
In September, the weather is noticeably cooler compared to July, with minimum temperatures dropping to 0°C (32°F) and average highs reaching 24°C (75°F). This contrasts sharply with July's milder temperatures, which range from a minimum of 7°C (45°F) to an average maximum of 33°C (92°F). While both months experience similar levels of precipitation—September at 101 mm (4.0 in) over 14 days and July at 99 mm (3.9 in) over 13 days—the humidity level in September is significantly higher at 86%, compared to July's 72%. For a closer look at July's weather patterns, visit Uddevalla weather in July.
In comparing the weather patterns of September and August, we see notable differences in temperature and precipitation. September experiences a cooler temperature range, with minimums dipping to 0°C (32°F) and an average of 13°C (55°F), while August is warmer, with minimums around 6°C (44°F) and averages peaking at 16°C (61°F). The maximum temperatures in August can reach up to 33°C (91°F), significantly higher than the 24°C (75°F) recorded in September. Precipitation is also relatively high in both months, with September receiving 101 mm (4.0 in) over 14 rainy days and August slightly wetter at 119 mm (4.7 in) across 16 days. Furthermore, September's humidity is higher at 86%, compared to August's 77%, contributing to the overall cooler and more damp feel of September. For more details on August weather specifically, you can check Uddevalla weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 0°C (32°F) to a maximum of 24°C (75°F), with an average of 13°C (55°F). This month experiences about 101 mm (4.0 in) of precipitation over 14 days, accompanied by a relatively high humidity level of 86%. Conversely, October sees a decline in temperatures, with minimums dropping to -5°C (24°F) and an average of 9°C (48°F). The maximum temperature also decreases to 19°C (67°F). Precipitation remains almost the same at 103 mm (4.1 in) but occurs on more days, totaling 16, and humidity rises to 92%. For more detailed insights, you can check Uddevalla weather in October.
In comparing the weather conditions between September and November, it becomes clear that November brings cooler temperatures, with an average of just 5°C (41°F) compared to September's milder average of 13°C (55°F). While September enjoys a maximum temperature of 24°C (75°F), November's highs only reach 15°C (59°F). Precipitation is generally less in November at 71 mm (2.8 in) compared to September's 101 mm (4.0 in), although both months experience precipitation on about 14 days. The humidity also rises in November, reaching 93% compared to September's 86%. For more specific information about November conditions, you can explore Uddevalla weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a minimum of 0°C (32°F) to a maximum of 24°C (75°F), with an average of 13°C (55°F). The month experiences 101 mm (4.0 in) of precipitation over 14 days, accompanied by a humidity level of 86%. Conversely, December is much colder, with temperatures dropping to a minimum of -13°C (8°F) and an average temperature of just 2°C (35°F), peaking at a maximum of 10°C (50°F). This month sees a lower total precipitation of 70 mm (2.7 in) over the same number of days, but the humidity rises to 93%. For a closer look at the specific conditions in December, check out Uddevalla weather in December.
As September unfolds in Uddevalla, it presents a notable transition from the lingering warmth of summer to the crisp embrace of autumn. With an average temperature hovering around a comfortable 13°C (55°F), this month offers a delightful blend of mild days and cooler nights, a stark contrast to the summer heat. The increased humidity and precipitation, typical of this time, signal a shift in the weather pattern, with rain gracing the area on about half of the days. This enhanced moisture not only nurtures the vibrant fall foliage but also adds an enchanting charm to the landscape. For a more in-depth look at what to expect throughout the year, visit Uddevalla Climate.